{"id":6271,"date":"2026-06-01T13:52:23","date_gmt":"2026-06-01T13:52:23","guid":{"rendered":"https:\/\/www.arysontechnologies.com\/blog\/?p=6271"},"modified":"2026-06-01T13:52:25","modified_gmt":"2026-06-01T13:52:25","slug":"office-365-tenant-migration-during-acquisition","status":"publish","type":"post","link":"https:\/\/www.arysontechnologies.com\/blog\/office-365-tenant-migration-during-acquisition\/","title":{"rendered":"Office 365 Tenant Migration During Acquisition Guide 2026"},"content":{"rendered":"
\n

Andriana\u2019s Query<\/b>: <\/strong><\/em>Does anyone have any experience with any platforms that can migrate 365 mailboxes by using the users’ credentials at the source tenant?<\/span><\/p>\n

We\u2019ve onboarded a client who\u2019s left a franchise, and the franchise IT support has said they can only give them their data from a 365 backup, and they can\u2019t auth any apps in their environment. <\/span>Is there any reliable way to migrate Office 365 mailboxes during an acquisition? <\/span><\/p>\n<\/div>\n

\n

Summary: Andriana, an IT professional in California<\/i><\/b>, needed to migrate Microsoft 365 mailboxes using user credentials because the client\u2019s former franchise refused third-party app authentication. Such challenges generally take place during acquisitions, where restricted tenant access affects the standard migration methods. This guide explains the manual methods to Office 365 tenant migration during acquisition. Along with that, it explains how the <\/span>Aryson Microsoft 365 Migration Tool<\/b><\/a> provides a secure tenant migration.<\/span><\/strong><\/em><\/p>\n

Download Now<\/a>\u00a0\u00a0 Purchase Now<\/a><\/span><\/p>\n<\/div>\n

\n
\n

Table of Contents<\/p>\nToggle<\/span><\/path><\/svg><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n