Login failed for user '(Null)'

Our QA guy just asked me for some help because he suddenly got the (dreaded)
"Login failed for user '(Null)'" message when connecting to the QA database
from his desktop.
There have been no (known) changes since he last used it a week, or two ago
and I've validated his login, Windows auth, ping from his bot to the DB
server, telnet to server 1433 and a few other things.
His password hasn't changed either.
Not sure what to do?
Solved.
Non-domain local account and the password had expired.
Arggg!!! Why didn't Microsoft just say "Can't login", or "No Password", or
something.
"Jay" <nospam@.nospam.org> wrote in message
news:O9Wa$vUMIHA.4476@.TK2MSFTNGP06.phx.gbl...
> Our QA guy just asked me for some help because he suddenly got the
> (dreaded) "Login failed for user '(Null)'" message when connecting to the
> QA database from his desktop.
> There have been no (known) changes since he last used it a week, or two
> ago and I've validated his login, Windows auth, ping from his bot to the
> DB server, telnet to server 1433 and a few other things.
> His password hasn't changed either.
> Not sure what to do?
>