Test jobs of individual backups worked well but now I try to backup the entire cluster the job fails.
I looked at the log and noticed the following error:
Error Multiple connections to a server or shared resource by the same user, using more than one user name, are not allowed. Disconnect all previous connections to the server or shared resource and try again at Veeam.Backup.UI.Repository.CStorageInvestigator.Investigate()
Have you maybe mounted the CIFS share as local drive on the Veeam server via windows explorer (connect network drive as letter X:) ? You probably need to disconnect all mounted drive so Veeam can connect to that share.
Luca.
Luca Dell'Oca Principal EMEA Cloud Architect @ Veeam Software
Or you have just browsed your share on your server which will leave the connection open. Just open a command prompt and type "net use". There you should see all your connected shares. Close the corresponding one by using "net use <driveletter> or <\\path_to_share> /delete".
Alex, please include the support case ID if you'd like to keep this topic open. With all technical issues, opening a case should be the first step, as it is explained when you click New Topic.