• Hello Brian, thanks for the answer.

    The trouble is as follows - I have a NAS storage which is a part of an Active Directory forest.

    When I try to create data files with SQL 2005 (SQL 2000 works fine) - I get permission denied even if I grant Full Control to Everyone. After resorting to a network sniffer, I found out that when SQL2005 tries to create the files, it tries to give permissions to the local group (the SQLServer2005MSSQLUser$ComputerName$MSSQLSERVER one) and because its SID is unknown to the ActiveDirectory, our NAS rejects it - that's why I want to use domain groups instead of local ones. Does anybody have any suggestions?

    EDIT: I should mention that I am using a domain user.