Some messages could not be FETCHed: The item we attempted to migrate could not be exported from Google. The item may not have been exported due to one of the following problems:
- Google's servers encountered a problem when exporting the item.
- The item is corrupt and not exportable.
- The item was moved or deleted.
Resolution:
Submit your mailbox in Retry Mailbox Migration Errors mode after the mailbox has successfully migrated.