On a network I am working on Exchange 5.5 works well with Outlook 98. We have upgraded some workstations to Office 2000 with Outlook 2000 and Outlook 2000 goes to an endless hourglass and can't find the Exchange 5.5 server. The server which has Exchange 5.5 shows up in Network Neighborhood and all the server drives are mappable to programs but Outlook 2000 won't see it. What could be wrong? Thanks.