How to Fix “StalledDueToTarget_Processor” Error during Exchange Migration in Office 365?

Summary: You may get the error StalledDueToTarget_Processor, while performing a move request during Exchange Server migration. In this post, we’ve discussed this error in detail and the solutions to fix it. Also, you’ll get to know about an EDB converter tool that can directly export mailboxes from on-premises Exchange to Office 365 or Microsoft 365 without any issues.

More and more companies are migrating to Office 365 or Microsoft 365 as they are looking to reduce their capital cost and gain from a cloud service to host their emails, files, and collaboration tools while consolidating their infrastructure. However, migration can be tricky. Without a proper migration plan, you will definitely face problems.

Sometimes, even with proper planning, you encounter unforeseen issues. Below, we will be discussing a particular error that may occur while creating a move request from an on-premises server to Office 365.

When performing a move request, you will get an error in the report, saying StalledDueToTarget_Processor. See the complete error message.

{DataExportTransientException: MapiFxProxyTransientException: The data export was cancelled due to a timeout. The destination didn't respond in time. --> The data export was cancelled due to a timeout. The destination didn't respond in time., DataExportTransientException: MapiFxProxyTransientException: The data export was cancelled due to a timeout. The destination didn't respond in time. --> The data export was cancelled due to a timeout. The destination didn't respond in time., DataExportTransientException: MapiFxProxyTransientException: The data export was cancelled due to a timeout.

Identify and Investigate the “StalledDueToTarget_Processor” Error

Get-MoveRequest -Identity   | Get-MoveRequestStatistics -IncludeReport | FL

How to Fix “StalledDueToTarget_Processor” Error?

One of the solutions to fix the problem is to change the configuration file of the Mailbox Replication locally.

Step 1: First, you need to locate the file MSExchangeMailboxReplication.exe.config file and update it with some things to retry the move request.

Note: The file is in the Program Files, Microsoft, Exchange Server, V15, Bin folder. The V15 represents Exchange Server 2013. If you have a newer Exchange Server, the folder name would represent the version number of the server.

Step 2: Once located, open the file with Notepad or any other text editor and locate the DataImportTimeout line. Now, before editing this file, it is important to take a safe copy of the file and save it in the same location to revert if needed.

Once the copy is made, change the value to 20 and save the file.

Step 3: After the file is saved, restart the Microsoft Exchange Mailbox Replication service. To do so,

Step 4: Enter services.msc and click on OK.

Step 5: Find the Microsoft Exchange Mailbox Replication service.

Step 6: Right-click on the service and click on Restart.

Alternatively, you can use PowerShell to run the command Restart-Service with the following parameters.

If your setup includes more than one Client Access Server (CAS), the above modification needs to be done on each server.

If you have other move requests, it’s better to take a note beforehand as these might get interrupted, and you would need to re-run them after the restart of the service. Normally, it would take up to four hours for the migration batches to resume.

After this change, it’s important to monitor the event viewer for any issues that might re-occur.

In a normal scenario, this should work. However, you need to consider the fact that this might re-occur. The problem may not get fixed as each setup is different.

Conclusion

Alternatively, you can use Stellar Converter for EDB as a migration application. The application can open multiple EDB files from any version of Exchange Server, browse through it, and extract mailboxes, shared mailboxes, disabled mailboxes, and public folders and save them to PST and other formats. With this EDB to PST conversion tool, you can easily migrate to Office 365 or Microsoft 365 and other Exchange Server as it allows you to export directly to the system with manual or automatic mailbox matching. You have other features, like parallel export, continuation in case of interruption, and set mailbox priority to export a set of importantly marked mailbox.

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