Exchange 2000 with Outlook 2000 client. One user's mailbox only is causing trouble - all others fine.
The problem mailbox can receive mail but not send it, and can't access the Global Address List. Error message "Network problems are preventing connection to the Microsoft Exchange Server computer" is displayed when trying to send mail or enter addresses. All other network functions are working fine, though, it's just the mailbox. (It also used to hang on shutdown, but that problem has been solved in the course of trying to solve this - see below).
User with problem mailbox has the same problem on other workstations, other users can access their email on his workstation without problems.
Have tried deleting the re-creating the profile from the user's workstation. The first time the user opens the mailbox after the profile has been re-created, the mailbox works fine, can send mail and access the address book. Once Outlook has been shut down, the mailbox has the problems again.
Have tried exporting all mail out of the mailbox, deleting and re-creating the mailbox on the server, then importing all the mail. (Tried this with both Exmerge and the manual export on the workstation.) It hasn’t solved the sending mail and address book problems - but it did get Outlook shutting down in a timely fashion.
Any more suggestions?