We have Outlook2001 and Exchange 5.5 running on the Macintosh OS 9.2. When we try to send a message from Outlook 2001, we get a message "Communicate with server". Eventually, the message went away as if it was sent. However, the message is not in the Sent Items folder. This is an intermitten problem. We do not get the same message for every new email message. However, we do not get the "Communicate with server" message when we try to send the message from Exchange 5.5. Do you have any suggestions? Thanks.