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Fix Microsoft 365 Migration Batch Missing Complete Link
Question details
The user is unable to finish an IMAP email migration because the option to complete the migration batch is not visible in the Microsoft 365 interface.
- Product
- Microsoft 365
- Device & OS
- not provided
- Scenario
- Performing an IMAP email migration to Exchange Online via the Microsoft 365 admin center.
- Observed behavior
- The migration batch is stuck in a Synced state at 100%, but the 'Complete migration batch' link is missing. Additionally, some mailboxes display an 'Investigate' status due to data consistency scores.
Ensure you have Exchange Administrator permissions in your Microsoft 365 tenant and access to the Exchange admin center to view detailed mailbox sync logs.
Review Data Consistency Scores and Contact Support
Investigate the mailboxes flagged with consistency issues and consult Microsoft's specialized Exchange support for backend resolution.
When an IMAP migration batch reaches 100% but hides the completion link, it is usually because background Data Consistency Scores (DCS) have flagged corrupted or skipped items. These items require manual administrator approval before Exchange Online allows the batch to finalize.
Navigate to the Exchange admin center, go to Migration, and click on your specific batch. Review the individual mailboxes showing an 'Investigate' status to see if there are skipped items preventing completion.
If you see a prompt regarding Data Consistency Scores, you may need to click 'Approve skipped items' to allow the sync process to register as truly complete.
If the Complete link remains hidden after approving items, navigate to Microsoft Learn or Microsoft Q&A. Post your detailed batch logs under the 'Exchange Server Management' tag so Microsoft engineers can troubleshoot the backend.
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Frequently Asked Questions
Why does my Microsoft 365 migration batch say Investigate?
This status appears when the Data Consistency Score (DCS) identifies potential data loss issues, such as corrupted items or oversized attachments, that need manual administrator approval before the migration can proceed.
Can I force complete a migration batch in Exchange Online?
Yes, if the UI link is missing but the data is safely synced, administrators can use Exchange Online PowerShell to run the Complete-MigrationBatch cmdlet to force the process.
What does a 100% Synced state mean if I cannot complete it?
A 100% Synced state simply means the initial data transfer has finished. However, background checks, indexing, or pending DCS approvals might still be active, which temporarily hides the Complete link in the admin center.
