How to Resolve Unexpected QuickBooks Migration Failures Unexpected QuickBooks migration errors can happen for a number of reasons, but they can be fixed with the correct troubleshooting techniques. Make sure your source and destination versions of QuickBooks are compatible before proceeding. Make sure both versions are compatible with the migration if you're switching from QuickBooks Desktop to QuickBooks Online or between versions. Use QuickBooks' Verify and Rebuild Tool to check for and repair any file corruption, and make a backup of your company file to prevent data loss. For More : https://a2autocare.com/article/quickbooks-migration-failed-unexpectedly/