We received a report from several offices that users were unable to access server shares or print until their passwords were reset in AD.
Users were able to log into their computers and send/receive mail.
The users were receiving a "user name could not be found" error when attempting to connect to servers and the printers were showing "Unable to Connect".
The problem was that the User Principal Name (UPN) was holding old cached values. Logging into the computer using the full UPN (first.last@domain.com), restarting and logging back in with the normal AD name (first.last) resolved the issue.
This problem seemed to only affect users who had had their UPN updated recently.
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