- Error -521 – the resolution depends on the actual cause. If anti-virus software is running on the server, do a comprehensive and exhaustive check on which subfolders the software is running against and remove the Exchange databases, log files, and check files and remove the M: drive from the scan. If you are using 3rd Party backup software, attempt a backup with NT Exchange-aware backup. If it succeeds, check with your vendor for any patches, updates, or fixes for your software.
- Error -1032 – ensure the account performing the backup has enough permissions to perform the backup.
- Error -612 – Check the Application log carefully for related events and patterns that may relate to this event. Check the System log carefully for related events and patterns including any errors related to hardware, drives, controllers, or the file system. If there are any such errors, replace the hardware, update the hardware system files, or repair the file system to prevent any future errors. If the information store database is running, it is suggested that you ExMerge your data to .pst files. You then may be able to stop the information store. If the database is consistent with Eseutil /MH, you can then remove all the log files and check file, start the information store, and perform a successful online backup.
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