For security purposes, I changed our Samba file server to be a member of the Active Directory domain. This way, domain users on Windows 7 workstations can map Samba shares with domain credential automatically. That bit works fine.
My problem is that I use the Domain Administrator account (Administrator) as the main login account for the SQL Server host (also Windows 7). I can still log into that host with the Administrator account, but I can no longer map Samba shares even though I enter the correct domain credentials. I now get "Access is denied". I can map the Samba shares using the credentials of other domain users (actual users).
I probably shouldn't have used that account in the first place, but I did. Is there a way around this or do I have create a new domain account for this purpose?