Hi, I have a SQL Server that has a linked server to itself. Two databases. I have a SQL job that runs a stored procedure that moves data between the two databases through the linked server. This job out of the blue just started failing with this error. "Login failed for user 'domain\user'. [SQLSTATE 28000] (Error 18456) 2013-05-09 22:00:01.8989434 [SQLSTATE 01000] (Error 0). The step failed. If I run this stored proc manually there are no issues. If I had a linked server to a different physical server then I would have some idea of how to fix this but since this all takes place on one server, I'm lost. The user that it says is failing is the windows account that SQL Server and the SQL agent run under, so the account is not the issue. The linked server is running "Be made using the login's security context". I have also tried re-creating the job and tried running the job as other users, etc, but nothing works. Like I said this job worked for a while, then just stopped working. There were no changes made to the linked server, stored proc or job. Any ideas? Thank you!