I ran into an odd problem. I tried to disable an old, unused login but when I clicked OK the server came back with the following error
The database 'xyz' does not exist. Supply a valid database name.
The odd thing is that that database was detached years ago. Somewhere, SQL still has some reference to it. Where can I look and how can it be removed?
Thanks.

xyzdatabase set as its default database that he used to connect to?