I have the following problem. We installed and used MS SQL server 2008R2 on a Windows 2008R2 server that was set up as a database server. It was a single standing machine with no domain but set up as member of a workgroup.
SQLserver was set up with Windows authorization.
We developed an application on the SQL server and everything was fine. When we some weeks later attached the server to our newly created domain, we could not access the databases and our applications anymore.
We are getting the error message .."Windows authentication<user> SQL STATE=2800 <user> cannot be authenticated.
We think our domain server is set up properly and we have no issues with other applications or computers on the network.
Just SQL SRV 2008 - probably an issue with the SQL internal security mechanisms. Is there any suggestions what we can do short from deleting SQL server and reinstalling it fresh on the domain?
Thanks in advance for any feedback. J.M.