Problem mit IN-SITU oder IN-PLACE_ARCHIVE

Hi guys, I need help with backing up a Microsoft Exchange Archive Server.
This server has so called IN-SITU or IN-PLACE-ARCHIVE.
However, I cannot back up these archives, the task aborts.
Message:V-79-57344-913 - Backup Exec cannot find a copy of the Exchange database. Check the backup selection and ensure that a valid copy is available on the server and run the job again.

I have Veritas 22.1 1193 running on Server 2022.
Normal Exchange backups are running.
I must be able to restore an archive.

Thanks