I am currently trying to run SQL Server Management Studio 2008 as a user who is on a different domain. I noticed in other threads that running the following command from a
Try this:
NET USE \\DBSERVER /USER:DOMAIN\USERNAME
You will be prompted for your password. This establishes a NetBIOS session with the database server. You should be able to see the shared folders and shared printers on the database server once you have done that.
If that works you should be able to connect using SSMS as yourself. You may have to specify "named pipes" as the network protocol to usem, if it doesn't work with TCP (but I think it will).
Named Pipes inherits your existing NetBIOS session, so provided you can list the shares you are probably good to go.
Update: It looks like in some configurations this does not work with TCP connections, (possibly due to some security update). In these cases you should enable Named Pipes, and set named pipes in your connection string.