Since yesterday we've got a bizarre issue, that just one of our users can't sign into his GroupWise account anymore. (Passwords have been reset, different clients have been tried (also webaccess))
The only way to view the mailbox is via a proxy-access he issued to another employee some time ago.
However this doesn't help much, since new eMails don't seem to arrive in the mailbox anymore.

I've already checked if the account is somehow disabled within Console One, but everything seems to be in order there too...
The only error message I get is when logging into the webaccess: 951F (which means: username or password is incorrect)

Has anyone got an idea what else I could check or try, to solve this issue?

thanks in advance