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Written By Rohan Wiese
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Updated on March 30th, 2026
Microsoft users often encounter the Outlook Error code 0x80040115. This error is categorised as a Send/Receive error that occurs when there is a connectivity issue between Microsoft Outlook and the Mail servers. This issue occurs frequently, especially in environments that are connected to Microsoft Exchange or Office 365.
A common error message that appears in the Send/Receive Progress window in Microsoft is as follows:
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“Task ‘Microsoft Exchange Server’ reported error (0x80040115): The connection to the Microsoft Exchange Server is unavailable. Outlook must be online or connected to complete this action.” |
Now, there might be several reasons behind this connectivity issue. Let us understand them first in the upcoming section.
It is important to understand the root causes behind the error 0x80040115 in order to fix it correctly. Listed below are some of the causes. Analyze your exact issue and choose a suitable recovery method among the ones discussed ahead.
Now, we will explore some of the potential methods to resolve the error 0x80040115 Outlook. Make sure you read through each method carefully to choose one as per the cause of the actual problem. In case none of the manual methods work for you, better opt for the advanced solution to recover your OST files.
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C:\Program Files (x86)\Microsoft Office\root\Office16\ScanPST.exe |
ScanPst is a built-in tool that helps to fix the damaged data files and can resolve connectivity issues.
Note:- If your PST file becomes severely corrupted, using a reliable Outlook PST Repair Tool is essential. It can quickly fix damaged data files and recover emails, contacts, attachments, and other mailbox items without data loss. With advanced recovery features, these tools help restore access to your mailbox safely and efficiently, ensuring your important information remains intact.
Important Note: In case none of the above methods work for you, the real issue might reside in the OST files. Even a corrupted OST file can result in the Outlook error 0x80040115. Therefore, to repair these corrupted Outlook files, use the recovery software mentioned below.
Aryson OST Recovery Tool is the most reliable software that helps users to repair and recover batches of inaccessible OST files in one go with complete data integrity and accuracy. Moreover, this software provides the user with a preview panel to verify mailbox items before saving them. Additionally, it offers different advanced recovery modes: Standard, Advanced, and Deep for different levels of corruption. Also, it can save the resultant OST in file formats like PST, MSG, EML, MBOX, and DBX, etc.
Following the above steps, your OST files have been repaired successfully. This might now fix the error code 0x80040115 occuring.
In this blog, we explored some of the root causes of the Outlook error 0x80040115, along with the manual approaches and the automated solution. The user can first try the manual troubleshooting and fix the error code 0x80040115. But, if the manual methods fail, you must fix the corrupted OST files using the automated software discussed above. You can even try the advanced features of the software to simplify the conversion process. Still, if you get stuck anywhere in the process, reach out to our tech support team at Aryson for further assistance.
Ans- Outlook Error 0x80040115 is a Send/Receive connectivity error that occurs when Microsoft Outlook cannot connect to Microsoft Exchange, usually due to network, profile, or OST-related issues.
Ans- This message appears when Outlook fails to communicate with the Exchange server because of internet instability, DNS issues, firewall restrictions, or server downtime.
Ans- Check your internet connection, flush DNS, disable VPN, create a new Outlook profile, or repair Microsoft Office. In case nothing works, opt for the Aryson OST to PST Converter to fix Outlook cannot connect to the Server(0x80040115) error.
Ans- Yes, even a damaged or oversized OST file can interrupt synchronization and trigger Send/Receive failures.
Ans- No, it does not delete emails. However, it may block synchronization until the connection issue is resolved and prevent emails from being sent or received.
About The Author:
Rohan Wiese is a Technical Content Writer at Aryson Technologies, specializing in databases, e-mail recovery, and e-mail migration solutions. He enjoys conducting research and generating information that assists database administrators, businesses, and novices in resolving issues with MS SQL Server, MySQL databases, Cloud Computing, and Microsoft Exchange.
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