We have Exchange 07 with all clients on Outlook 07 (some XP some 7). Once in a while a user who's had cached credentials will suddenly be asked to enter their password. The username will be presented as "user.name" or "exchange\user.name" but never the correct "domain\user.name" and they won't be able to login unless they explicitly specify the proper domain as part of the username.
Anybody have any ideas what would cause this behavior? It seems to crop up rarely, but is frustrating for users, particularly at remote sites. Thanks,