>Hi
>
>I want to create a specific user to be used by a web service so any amendments by the web service in the database are tagged with that userid. (at the moment everything is going under sa)
>
>When I run a create user command I get an error.
>
>Windows NT user or group 'DEV01\Test.User' not found. Check the name again.
>
>What do I need to do (or a link to a good summary) to make this happen.

Do you mean that you just want a single user account for all hits on the web service or that you want to narrow it down to the specific user who is accessing the service ?