Hello TRNC, From what you stated in your original post  is it seems that you might have an issue with the backup account .  I would double check your setting & make sure that the following is configured correctly. 1) Make sure the OST container has been configured on the DR4000  2) Make sure the backup_user account has been configured in Backup Exec  3) Make sure the backup_user passwords match on the DR4000 and the Backup Exec media server Please let us know if you have any other questions.
I'm setting up a new DR4100 and trying to connect to it from a Win2k8 server running Backup Exec 2010 R3 SP4. All components have latest updates for software, plugins and drivers. I was able to install the OST plugin into BE and I've created an OST container on the DR, but I get the "OST client authentication failed" error when I try to add the openstorage device in BE. I've verified the password for the login account and I have the OST ports in the windows firewall on the BE server. What should I check next? Thanks.
OST Client Authentication Failed