I have a client who has about 30 users running Win XP and Outlook 2000/2003 on their workstations. All of a sudden today, about 4 of them have an issue when they open Outlook where it gives them a message that the mailstore is full and then opens the mailbox cleanup utility. This is NOT the problem as the mailstore is only 10GB and I have run the cleanup utility to recover any space from deleted accounts. There is a limit set for these users of 200MB, but the users in question are well below that at aroun 70MB. I have run a TrendMicro scan, installed the latest Office updates, and tried another profile. All these users are able to open their mailbox via OWA and see new emails, but the Outlook just will not synch them because it seems to think it has reached some limit. One last odd point is that I configured Outlook on another machine to open the mailbox of one of the users having a problem, and it opens fine there. Just not on their machine, even under a new profile.