On a network I administer, users frequently have messages ‘freeze’ in the outbox. They are all using Outlook 2000, with mail stored in an Exchange 2000 server (part of SBS 2000). When I try to open the itmes I get the message ‘This item cannot be opened’. The only way I have found to clear the outbox of the affected machines is to reboot the server. Sometimes ALL users are affected simultaneously. Today, only 1 user was affected, but no mail is leaving the server. I need help quickly! Thanks inadvance!