The Backup Administrator for the customer has left the company. Their user account has been removed from the domain. A new Backup Administrator has been found and their user account has been added to the Domain Administrators Group. However, the new Backup Administrator is now receiving alerts that some of the NAS file system backups are failing.

What should be checked first to ensure correct operations?

A.
Audit the CIFS service using “server_cifsstat” to validate the Backup Administrator is currently accessing the share

B.
Using the MMC plugin, validate the user rights and GPO settings for the CIFS server

C.
Usermapper database contains the new Backup Administrator UID/GID

D.
User added to Local Administrator Group on the Data Mover