NetApp CIFS and BackupExec12: What the What?

After adding our shiny, new shelf to our FAS2050A running ONTAP 7.2.5.1, I migrated all of the CIFS shares from controller A over to the new volume created on the shelf assigned to controller B. After completing migration and updating the DFS links, I let my backup administrator know to change the backups to point to controller B. However, when he tried, he kept getting credentials failed in Backup Exec, no matter what he used for credentials.

Symptoms:

Able to connect to Filer 1 via network share.
Able to connect to Filer 2 via network share.
Able to connect to Filer 1 via BackupExec (enumerated shares)
UNAble to connect to Filer 2 via BackupExec (prompted for credentials)

Solution:
Disable ndmp on filer.

If you do not have the ndmp license on Backup Exec so you are backing up the resources via Windows shares, ndmp causes Backup Exec to fail. I don't know why. It would be nice if Backup Exec would have a more informative error.

NDMP is disabled by default; however, in the process of transferring the CIFS qtrees from one controller to the other, I enabled it to get fast transfers while maintaining premissions.