{"id":3147,"date":"2026-04-28T11:54:21","date_gmt":"2026-04-28T11:54:21","guid":{"rendered":"https:\/\/www.arysontechnologies.com\/how-to\/?p=3147"},"modified":"2026-09-22T08:58:04","modified_gmt":"2026-09-22T08:58:04","slug":"move-mailbox-from-on-premise-to-microsoft-365","status":"publish","type":"post","link":"https:\/\/www.arysontechnologies.com\/how-to\/move-mailbox-from-on-premise-to-microsoft-365\/","title":{"rendered":"Migrate Exchange On-Premises to Office 365: Move Mailboxes, Emails, Contacts &#038; Calendar Data in 2026"},"content":{"rendered":"<div class=\"query\" style=\"background-color: #f7fff9; padding: 20px; \/* border-left: 3px solid #265378; *\/margin-bottom: 10px; border: 2px solid #00e477; border-radius: 19px;\">\r\n<p><em><strong>User Query:\u00a0<\/strong>The extended support of our Exchange 2016 server ended in October 2025. During an ongoing internal audit, this issue was highlighted last quarter. We have around 640 mailboxes, approximately 2.1 terabytes approx., in addition to public folders that no one&#8217;s even opened since 2019. Therefore, is there any way to migrate Exchange On Premise to Office 365.<\/em><\/p>\r\n<\/div>\r\n<div class=\"query\" style=\"background-color: #effaff; padding: 20px; border-left: 4px solid #265378; margin-bottom: 10px; border-radius: 20px; border-right: 4px solid #265378; box-shadow: rgba(60, 64, 67, 0.3) 0px 1px 2px 0px, rgba(60, 64, 67, 0.15) 0px 2px 6px 2px; \/* border-image: linear-gradient(to bottom, #62D593, rgba(0, 0, 0, 0)) 1 100%;\">\r\n<p><em><strong>Introduction:\u00a0<\/strong>Exchange on-premises servers hold mailboxes, public folders, and permissions inside a local Active Directory forest. Once support ends or hardware ages, organisations move that data to Exchange Online. In this blog, you will learn how to move from On-Premise Exchange to Office 365 with the help of manual methods or the <a href=\"https:\/\/www.arysontechnologies.com\/exchange-online-to-office-365-migration\/\"><strong>Aryson Exchange Online to Office 365 Migration<\/strong><\/a>. This will help enterprises that need direct mailbox migration of dismounted databases<strong>.<\/strong><\/em><\/p>\r\n<p><span class=\"block_btn\"><a class=\"custom-download-btn\" href=\"https:\/\/www.arysontechnologies.com\/demo-version\/exchange-server-backup.exe\"> Download Now<\/a>\u00a0\u00a0<a class=\"custom-buy-btn\" href=\"https:\/\/www.arysontechnologies.com\/exchange-server-backup\/buynow.php\"> Purchase Now<\/a><\/span><\/p>\r\n<\/div>\r\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_83 counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title ez-toc-toggle\" style=\"cursor:pointer\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.arysontechnologies.com\/how-to\/move-mailbox-from-on-premise-to-microsoft-365\/#Why_Do_Users_Migrate_On-Premise_Mailbox_to_O365\" >Why Do Users Migrate On-Premise Mailbox to O365?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.arysontechnologies.com\/how-to\/move-mailbox-from-on-premise-to-microsoft-365\/#Things_to_Do_for_Pre-Migration_Planning\" >Things to Do for Pre-Migration Planning<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.arysontechnologies.com\/how-to\/move-mailbox-from-on-premise-to-microsoft-365\/#How_to_Migrate_Exchange_On_Premise_to_Office_365\" >How to Migrate Exchange On Premise to Office 365?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.arysontechnologies.com\/how-to\/move-mailbox-from-on-premise-to-microsoft-365\/#Approach_01_Transfer_Mailbox_Data_from_Legacy_to_Cloud\" >Approach 01: Transfer Mailbox Data from Legacy to Cloud<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.arysontechnologies.com\/how-to\/move-mailbox-from-on-premise-to-microsoft-365\/#Steps_to_Migrate_On-Premise_mailbox_to_O365_are_as_follows\" >Steps to Migrate On-Premise mailbox to O365 are as follows:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.arysontechnologies.com\/how-to\/move-mailbox-from-on-premise-to-microsoft-365\/#Drawbacks_of_Manual_Methods\" >Drawbacks of Manual Methods<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.arysontechnologies.com\/how-to\/move-mailbox-from-on-premise-to-microsoft-365\/#Approach_02_Advanced_Solution_to_Migrate_Exchange_On_Premise_to_Office_365\" >Approach 02: Advanced Solution to Migrate Exchange On Premise to Office 365<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.arysontechnologies.com\/how-to\/move-mailbox-from-on-premise-to-microsoft-365\/#Simple_Steps_to_Move_Mailbox_from_On-Premise_to_Microsoft_365_are_as_Follows\" >Simple Steps to Move Mailbox from On-Premise to Microsoft 365 are as Follows<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.arysontechnologies.com\/how-to\/move-mailbox-from-on-premise-to-microsoft-365\/#Advantages_of_Opting_For_the_Aryson_Exchange_Server_Backup_Tool\" >Advantages of Opting For the Aryson Exchange Server Backup Tool<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.arysontechnologies.com\/how-to\/move-mailbox-from-on-premise-to-microsoft-365\/#Real-World_Success_Story\" >Real-World Success Story<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.arysontechnologies.com\/how-to\/move-mailbox-from-on-premise-to-microsoft-365\/#End_Note\" >End Note<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.arysontechnologies.com\/how-to\/move-mailbox-from-on-premise-to-microsoft-365\/#Frequently_Asked_Questions\" >Frequently Asked Questions<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"Why_Do_Users_Migrate_On-Premise_Mailbox_to_O365\"><\/span>Why Do Users Migrate On-Premise Mailbox to O365?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>Moving your mailbox from on-premises to Microsoft 365 represents a very effective method for decreasing your infrastructure expenses and also enhancing your email security. Some other advantages are<\/p>\r\n<ul>\r\n<li aria-level=\"1\">There will be no need for costly on-premises maintenance.<\/li>\r\n<li aria-level=\"1\">You can access your emails from anywhere with cloud-based mobility.<\/li>\r\n<li aria-level=\"1\">Moreover, it provides advanced security features with threat protection.<\/li>\r\n<li aria-level=\"1\">Users can benefit from <em>automatic updates<\/em> without downtime.<\/li>\r\n<li aria-level=\"1\">Additionally, collaboration is improved with integrated applications.<\/li>\r\n<li aria-level=\"1\">Also, it ensures business continuity with disaster recovery solutions.<\/li>\r\n<\/ul>\r\n<h2 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"Things_to_Do_for_Pre-Migration_Planning\"><\/span>Things to Do for Pre-Migration Planning<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>Before you perform a migration from Exchange On-Premise to Office 365, it is essential to properly plan the migration to achieve accuracy. The key planning steps include:<\/p>\r\n<ul>\r\n<li aria-level=\"1\">Evaluate your Exchange Server version &amp; verify hybrid deployment requirements.<\/li>\r\n<li aria-level=\"1\">Your domain ID must be authenticated to the Microsoft 365 account.<\/li>\r\n<li aria-level=\"1\">Users can schedule the migration process for non-working hours to reduce disruption.<\/li>\r\n<li aria-level=\"1\">Create complete backups of all mailboxes before migration, depending on your organization&#8217;s recovery strategy.<\/li>\r\n<\/ul>\r\n<h2 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"How_to_Migrate_Exchange_On_Premise_to_Office_365\"><\/span>How to Migrate Exchange On Premise to Office 365?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>In this section, you will find the best possible methods to migrate or transfer your on-premise mailbox data to Microsoft 365. Follow the steps associated with the methods to efficiently perform the migration.<\/p>\r\n<ul>\r\n<li aria-level=\"1\"><strong>Transfer Mailbox Data from Legacy to Cloud<\/strong><\/li>\r\n<\/ul>\r\n<ul>\r\n<li aria-level=\"1\"><strong>Quick Solution for Migration<\/strong><\/li>\r\n<\/ul>\r\n<h3 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"Approach_01_Transfer_Mailbox_Data_from_Legacy_to_Cloud\"><\/span>Approach 01: Transfer Mailbox Data from Legacy to Cloud<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<p><strong><a href=\"https:\/\/learn.microsoft.com\/en-us\/exchange\/hybrid-deployment\/move-mailboxes\" target=\"_blank\" rel=\"noopener\">Hybrid migration<\/a><\/strong> is used to integrate the on-premises Exchange and M365 in an effective manner. This method makes sure to keep the on-premises and cloud mailboxes exactly as they are. Once you&#8217;ve set up your hybrid environment, it&#8217;s then possible to migrate mailboxes remotely \u2013 all without interrupting your users&#8217; workflow. Now, follow the Microsoft 365 email migration steps given below.<\/p>\r\n<h4 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"Steps_to_Migrate_On-Premise_mailbox_to_O365_are_as_follows\"><\/span>Steps to Migrate On-Premise mailbox to O365 are as follows:<span class=\"ez-toc-section-end\"><\/span><\/h4>\r\n<ol>\r\n<li aria-level=\"1\">Verify that your Exchange Server version, cumulative updates, and hybrid deployment prerequisites are supported.<\/li>\r\n<li aria-level=\"1\">After that, download &amp; launch the Hybrid Configuration Wizard from M365.<\/li>\r\n<li aria-level=\"1\">Now, enter the required credentials for on-premise &amp; Microsoft 365 admin accounts.<\/li>\r\n<li aria-level=\"1\">Ensure that the Mailbox Replication Service Proxy (MRS Proxy) and migration endpoint are configured correctly.<\/li>\r\n<li aria-level=\"1\">Configure Microsoft Entra synchronization according to your organization&#8217;s identity requirements.<\/li>\r\n<li aria-level=\"1\">Open the Exchange Admin Center (EAC) and navigate to Migration.<\/li>\r\n<li aria-level=\"1\">Select Add a migration batch and choose Remote move migration.<\/li>\r\n<li aria-level=\"1\">Select the appropriate migration endpoint and add the mailboxes you want to migrate.<\/li>\r\n<li aria-level=\"1\">Review the migration settings and start the migration batch.<\/li>\r\n<li aria-level=\"1\">Monitor the synchronization and complete the mailbox move according to your migration plan.<\/li>\r\n<\/ol>\r\n<p><strong>Important Note: <\/strong>Hybrid migration helps keep user disruption very low since email content is kept in sync right up until the final cut-over point. Admins can even plan the final stage for outside office hours \u2013 this eventually reduces any impact on users.<\/p>\r\n<div class=\"py-3r ps-3\" style=\"border: 2px solid #c2410c; margin-top: 10px; margin-bottom: 10px; padding-top: 8px; padding-left: 10px; border-radius: 10px; background: #fff7ed;\">\r\n<h4 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"Drawbacks_of_Manual_Methods\"><\/span>Drawbacks of Manual Methods<span class=\"ez-toc-section-end\"><\/span><\/h4>\r\n<ul>\r\n<li aria-level=\"1\">Users must acquire technical expertise in Exchange administration.<\/li>\r\n<li aria-level=\"1\">You need to set up the complex hybrid infrastructure on your own.<\/li>\r\n<li aria-level=\"1\">Moreover, it consumes significant time to troubleshoot connectivity issues.<\/li>\r\n<li aria-level=\"1\">With this method, users must manually handle migration monitoring.<\/li>\r\n<\/ul>\r\n<\/div>\r\n<h3 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"Approach_02_Advanced_Solution_to_Migrate_Exchange_On_Premise_to_Office_365\"><\/span>Approach 02: Advanced Solution to Migrate Exchange On Premise to Office 365<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<p>The <strong>Aryson Exchange Server Backup Tool<\/strong> is one of the most recommended solutions that helps organisations and working professionals to move on-premises data to M365 efficiently. You can use this software to migrate large datasets (1000+ mailboxes) with complete accuracy &amp; minimal effort. Moreover, it provides users with flexibility and allows them to apply filters &amp; select specific folders. Additionally, users can securely log in to their source and target accounts with the help of modern OAuth 2.0 or the impersonation method. This makes the software suitable for organisations that prefer to opt for an efficient transfer to the cloud with minimal downtime.<\/p>\r\n<h4 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"Simple_Steps_to_Move_Mailbox_from_On-Premise_to_Microsoft_365_are_as_Follows\"><\/span>Simple Steps to Move Mailbox from On-Premise to Microsoft 365 are as Follows<span class=\"ez-toc-section-end\"><\/span><\/h4>\r\n<ol>\r\n<li aria-level=\"1\">Download and run the <strong>Aryson Exchange Server Backup Tool<\/strong>.<\/li>\r\n<li aria-level=\"1\">Select <strong>Office 365<\/strong> as the source and <strong>log in<\/strong> to your Exchange On-premise account.<\/li>\r\n<li aria-level=\"1\"><strong>Select the required mailboxes<\/strong> and data to migrate to Office 365.<\/li>\r\n<li aria-level=\"1\">Choose <strong>Office 365<\/strong> card &gt;&gt; <strong>sign in<\/strong> to the target Office 365 account.<\/li>\r\n<li aria-level=\"1\">Apply the <strong>required filters<\/strong> and click on <strong>Start Backup<\/strong> to begin the migration.<\/li>\r\n<li aria-level=\"1\"><strong>Monitor the migration<\/strong> via the progress panel of the software.<\/li>\r\n<\/ol>\r\n<div style=\"border: 2px solid #4a6fa5; padding: 10px; margin-top: 10px; margin-bottom: 10px; border-radius: 25px; background-color: #f4f7fb; font-family: Arial, sans-serif; font-size: 16px; line-height: 1.5; text-align: left;\">Even if you follow the above steps, you can migrate user from on-premise Exchange to Office 365. However, to get a more detailed insight into the software, it is better to read through the <a href=\"https:\/\/www.arysontechnologies.com\/exchange-server-backup\/how-it-works.html\" target=\"_blank\" rel=\"noopener\"><strong>complete documentation<\/strong><\/a> of the software and then only perform the migration.<\/div>\r\n<h4 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"Advantages_of_Opting_For_the_Aryson_Exchange_Server_Backup_Tool\"><\/span>Advantages of Opting For the Aryson Exchange Server Backup Tool<span class=\"ez-toc-section-end\"><\/span><\/h4>\r\n<ul>\r\n<li aria-level=\"1\">It makes the migration process faster &amp; easier to manage.<\/li>\r\n<li aria-level=\"1\">Users can migrate without complex hybrid configurations.<\/li>\r\n<li aria-level=\"1\">You can even convert a user mailbox to a shared mailbox.<\/li>\r\n<li aria-level=\"1\">It supports bulk mailbox migration, saving considerable time.<\/li>\r\n<li aria-level=\"1\">The interface is intuitive without requiring advanced skills.<\/li>\r\n<li aria-level=\"1\">Users can even <strong><a href=\"https:\/\/www.arysontechnologies.com\/blog\/backing-up-microsoft-exchange-online-mailboxes\/\" target=\"_blank\" rel=\"noopener\">backup Exchange Online Mailboxes<\/a><\/strong> with this software.<\/li>\r\n<li aria-level=\"1\">It maintains data integrity while transferring emails.<\/li>\r\n<li aria-level=\"1\">Users get filtering options to customise the migration scope.<\/li>\r\n<\/ul>\r\n<h4 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"Real-World_Success_Story\"><\/span>Real-World Success Story<span class=\"ez-toc-section-end\"><\/span><\/h4>\r\n<div style=\"border: 2px solid #FF69B4; padding: 10px; margin-top: 10px; margin-bottom: 10px; text-align: center; border-radius: 25px; background-color: #e6f2ff; font-family: Arial, sans-serif; font-size: 16px; line-height: 1.5;\">\r\n<p style=\"text-align: left;\"><em>A mid-sized organisation faced challenges migrating hundreds of Exchange mailboxes to Microsoft 365 due to complex configurations and limited IT resources. The <strong>Aryson Exchange Server Backup Tool<\/strong> resolved these issues through bulk migration, folder filters, and secure authentication, reducing manual effort.<\/em><\/p>\r\n<\/div>\r\n<h4 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"End_Note\"><\/span>End Note<span class=\"ez-toc-section-end\"><\/span><\/h4>\r\n<p>In this article, we discussed some of the most reliable ways to migrate Exchange On Premise to Office 365. You can go for the manual hybrid method or opt for the above automated software based on your expertise &amp; mailbox count. The manual approach works for organizations with IT resources. The professional tool makes the process easier for large-scale migrations. you choose the right method, the migration process becomes simple and efficient. Also, if you face any issues, you can reach out to the support team for help.<\/p>\r\n<h3 class=\"faq-main_heading\"><span class=\"ez-toc-section\" id=\"Frequently_Asked_Questions\"><\/span>Frequently Asked Questions<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n\r\n<div class=\"schema-faq wp-block-yoast-faq-block\">\r\n<div id=\"faq-question-1790063798694\" class=\"schema-faq-section\"><strong class=\"schema-faq-question\"><strong>Q.1 How to Migrate Exchange On Premise to Office 365?<\/strong><\/strong>\r\n<p class=\"schema-faq-answer\"><strong>Ans:<\/strong> Either you use the Aryson Exchange Server Backup Tool or opt for the manual method. Both methods serve the user with an efficient migration; however, it is recommended to use the professional software to migrate large datasets securely.\u00a0<\/p>\r\n<\/div>\r\n<div id=\"faq-question-1790063801120\" class=\"schema-faq-section\"><strong class=\"schema-faq-question\"><strong>Q2. Will users lose access to emails during migration?<\/strong><\/strong>\r\n<p class=\"schema-faq-answer\"><strong>Ans:<\/strong> No, if you have chosen the above professional software and have used it appropriately, there is no way you will lose emails during migration.<\/p>\r\n<\/div>\r\n<div id=\"faq-question-1790063801737\" class=\"schema-faq-section\"><strong class=\"schema-faq-question\"><strong>Q3. How long does mailbox migration take?<\/strong><\/strong>\r\n<p class=\"schema-faq-answer\"><strong>Ans:<\/strong> Exchange on-premises migration to M365 might require a certain amount of time \u2013 influenced by variables like mailbox sizes, total mailboxes involved, your network&#8217;s speed, and also how well your servers perform. However, the Aryson Exchange Server Backup Tool makes this entire migration process much more efficient for admins by allowing them to move their mailbox information very efficiently indeed.\u00a0<\/p>\r\n<\/div>\r\n<div id=\"faq-question-1790063802280\" class=\"schema-faq-section\"><strong class=\"schema-faq-question\"><strong>Q4. Can I migrate specific folders instead of entire mailboxes?<\/strong><\/strong>\r\n<p class=\"schema-faq-answer\"><strong>Ans:<\/strong> Yes, the Aryson Exchange Server Backup Tool lets you migrate a certain number of mailbox folders, not your whole mailbox itself. You get to pick out which ones are important to move over and even set up filters so that you only migrate what&#8217;s needed for the task.<\/p>\r\n<\/div>\r\n<div id=\"faq-question-1790063802846\" class=\"schema-faq-section\"><strong class=\"schema-faq-question\"><strong>Q5. What are the prerequisites for Exchange On-Premises to Office 365 migration?<\/strong><\/strong>\r\n<p class=\"schema-faq-answer\"><strong>Ans:<\/strong> You will require an Exchange server with support, the necessary cumulative updates, confirmed Microsoft 365 domains, admin credentials &#8211; and also set up correctly your migration endpoint. Hybrid migrations may also require Microsoft Entra synchronisation and MRS Proxy configuration.<\/p>\r\n<\/div>\r\n<div id=\"faq-question-1790063803448\" class=\"schema-faq-section\"><strong class=\"schema-faq-question\"><strong>Q6. Can I migrate only selected mailboxes from Exchange Server to Microsoft 365?<\/strong><\/strong>\r\n<p class=\"schema-faq-answer\"><strong>Ans:<\/strong> Indeed, it is possible to migrate some mailboxes but not your whole Exchange setup. Hybrid migration supports mailbox batches, while the above software offers user selection and folder-level filtering, depending on its supported features.<\/p>\r\n<\/div>\r\n<div id=\"faq-question-1790063804585\" class=\"schema-faq-section\"><strong class=\"schema-faq-question\"><strong>Q.7 How can I choose the best software or service for Exchange On-Premises to Office 365 migration?<\/strong><\/strong>\r\n<p class=\"schema-faq-answer\"><strong>Ans:<\/strong> Choose a solution based on mailbox size, migration requirements, security, supported data types, filtering options, scalability, pricing, and technical support.<\/p>\r\n<\/div>\r\n<div id=\"faq-question-1790063807368\" class=\"schema-faq-section\"><strong class=\"schema-faq-question\"><strong>Q.8 Can I migrate Exchange On-Premises mailboxes to Office 365 using a hybrid migration approach?<\/strong><\/strong>\r\n<p class=\"schema-faq-answer\"><strong>Ans:<\/strong> Yes, you can migrate Exchange On-Premises mailboxes to Office 365 using a hybrid migration approach. However, for better security, it is recommended to use the Aryson Exchange Server Backup Tool.<\/p>\r\n<\/div>\r\n<\/div>\r\n\n\n<div class=\"kk-star-ratings kksr-auto kksr-align-left kksr-valign-bottom\"\n    data-payload='{&quot;align&quot;:&quot;left&quot;,&quot;id&quot;:&quot;3147&quot;,&quot;slug&quot;:&quot;default&quot;,&quot;valign&quot;:&quot;bottom&quot;,&quot;ignore&quot;:&quot;&quot;,&quot;reference&quot;:&quot;auto&quot;,&quot;class&quot;:&quot;&quot;,&quot;count&quot;:&quot;1&quot;,&quot;legendonly&quot;:&quot;&quot;,&quot;readonly&quot;:&quot;&quot;,&quot;score&quot;:&quot;5&quot;,&quot;starsonly&quot;:&quot;&quot;,&quot;best&quot;:&quot;5&quot;,&quot;gap&quot;:&quot;5&quot;,&quot;greet&quot;:&quot;Rate this post&quot;,&quot;legend&quot;:&quot;5\\\/5 - (1 vote)&quot;,&quot;size&quot;:&quot;24&quot;,&quot;title&quot;:&quot;Migrate Exchange On-Premises to Office 365: Move Mailboxes, Emails, Contacts \\u0026amp; Calendar Data in 2026&quot;,&quot;width&quot;:&quot;142.5&quot;,&quot;_legend&quot;:&quot;{score}\\\/{best} - ({count} {votes})&quot;,&quot;font_factor&quot;:&quot;1.25&quot;}'>\n            \n<div class=\"kksr-stars\">\n    \n<div class=\"kksr-stars-inactive\">\n            <div class=\"kksr-star\" data-star=\"1\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"2\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"3\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"4\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"5\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n    \n<div class=\"kksr-stars-active\" style=\"width: 142.5px;\">\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n                \n\n<div class=\"kksr-legend\" style=\"font-size: 19.2px;\">\n            5\/5 - (1 vote)    <\/div>\n    <\/div>\n","protected":false},"excerpt":{"rendered":"<p>User Query:\u00a0The extended support of our Exchange 2016 server ended in October 2025. During an ongoing internal audit, this issue<a class=\"read-more ml-1 main-read-more\" href=\"https:\/\/www.arysontechnologies.com\/how-to\/move-mailbox-from-on-premise-to-microsoft-365\/\">Read More<\/a><\/p>\n","protected":false},"author":6,"featured_media":3415,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[32],"tags":[],"class_list":["post-3147","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-microsoft-365"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Migrate Exchange On-Premises to Office 365 Account in 2026<\/title>\n<meta name=\"description\" content=\"Migrate Exchange On-Premises to Office 365. 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Both methods serve the user with an efficient migration; however, it is recommended to use the professional software to migrate large datasets securely.\u00a0\",\"inLanguage\":\"en-US\"},\"inLanguage\":\"en-US\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/www.arysontechnologies.com\\\/how-to\\\/move-mailbox-from-on-premise-to-microsoft-365\\\/#faq-question-1790063801120\",\"position\":2,\"url\":\"https:\\\/\\\/www.arysontechnologies.com\\\/how-to\\\/move-mailbox-from-on-premise-to-microsoft-365\\\/#faq-question-1790063801120\",\"name\":\"Q2. Will users lose access to emails during migration?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"<strong>Ans:<\\\/strong> No, if you have chosen the above professional software and have used it appropriately, there is no way you will lose emails during migration.\",\"inLanguage\":\"en-US\"},\"inLanguage\":\"en-US\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/www.arysontechnologies.com\\\/how-to\\\/move-mailbox-from-on-premise-to-microsoft-365\\\/#faq-question-1790063801737\",\"position\":3,\"url\":\"https:\\\/\\\/www.arysontechnologies.com\\\/how-to\\\/move-mailbox-from-on-premise-to-microsoft-365\\\/#faq-question-1790063801737\",\"name\":\"Q3. How long does mailbox migration take?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"<strong>Ans:<\\\/strong> Exchange on-premises migration to M365 might require a certain amount of time \u2013 influenced by variables like mailbox sizes, total mailboxes involved, your network's speed, and also how well your servers perform. However, the Aryson Exchange Server Backup Tool makes this entire migration process much more efficient for admins by allowing them to move their mailbox information very efficiently indeed.\u00a0\",\"inLanguage\":\"en-US\"},\"inLanguage\":\"en-US\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/www.arysontechnologies.com\\\/how-to\\\/move-mailbox-from-on-premise-to-microsoft-365\\\/#faq-question-1790063802280\",\"position\":4,\"url\":\"https:\\\/\\\/www.arysontechnologies.com\\\/how-to\\\/move-mailbox-from-on-premise-to-microsoft-365\\\/#faq-question-1790063802280\",\"name\":\"Q4. 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Both methods serve the user with an efficient migration; however, it is recommended to use the professional software to migrate large datasets securely.\u00a0","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.arysontechnologies.com\/how-to\/move-mailbox-from-on-premise-to-microsoft-365\/#faq-question-1790063801120","position":2,"url":"https:\/\/www.arysontechnologies.com\/how-to\/move-mailbox-from-on-premise-to-microsoft-365\/#faq-question-1790063801120","name":"Q2. Will users lose access to emails during migration?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"<strong>Ans:<\/strong> No, if you have chosen the above professional software and have used it appropriately, there is no way you will lose emails during migration.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.arysontechnologies.com\/how-to\/move-mailbox-from-on-premise-to-microsoft-365\/#faq-question-1790063801737","position":3,"url":"https:\/\/www.arysontechnologies.com\/how-to\/move-mailbox-from-on-premise-to-microsoft-365\/#faq-question-1790063801737","name":"Q3. How long does mailbox migration take?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"<strong>Ans:<\/strong> Exchange on-premises migration to M365 might require a certain amount of time \u2013 influenced by variables like mailbox sizes, total mailboxes involved, your network's speed, and also how well your servers perform. However, the Aryson Exchange Server Backup Tool makes this entire migration process much more efficient for admins by allowing them to move their mailbox information very efficiently indeed.\u00a0","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.arysontechnologies.com\/how-to\/move-mailbox-from-on-premise-to-microsoft-365\/#faq-question-1790063802280","position":4,"url":"https:\/\/www.arysontechnologies.com\/how-to\/move-mailbox-from-on-premise-to-microsoft-365\/#faq-question-1790063802280","name":"Q4. Can I migrate specific folders instead of entire mailboxes?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"<strong>Ans:<\/strong> Yes, the Aryson Exchange Server Backup Tool lets you migrate a certain number of mailbox folders, not your whole mailbox itself. You get to pick out which ones are important to move over and even set up filters so that you only migrate what's needed for the task.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.arysontechnologies.com\/how-to\/move-mailbox-from-on-premise-to-microsoft-365\/#faq-question-1790063802846","position":5,"url":"https:\/\/www.arysontechnologies.com\/how-to\/move-mailbox-from-on-premise-to-microsoft-365\/#faq-question-1790063802846","name":"Q5. What are the prerequisites for Exchange On-Premises to Office 365 migration?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"<strong>Ans:<\/strong> You will require an Exchange server with support, the necessary cumulative updates, confirmed Microsoft 365 domains, admin credentials - and also set up correctly your migration endpoint. Hybrid migrations may also require Microsoft Entra synchronisation and MRS Proxy configuration.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.arysontechnologies.com\/how-to\/move-mailbox-from-on-premise-to-microsoft-365\/#faq-question-1790063803448","position":6,"url":"https:\/\/www.arysontechnologies.com\/how-to\/move-mailbox-from-on-premise-to-microsoft-365\/#faq-question-1790063803448","name":"Q6. Can I migrate only selected mailboxes from Exchange Server to Microsoft 365?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"<strong>Ans:<\/strong> Indeed, it is possible to migrate some mailboxes but not your whole Exchange setup. 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