I recently bought a couple of machines for our office with Windows XP Pro. I loaded on our Office 2000 pro. Everything seemed to be working fine, except Outlook seems to be getting slower at delivering new mail from our Exchange Server. At first new messages weren't delivered to the inbox until 15 minutes after they had been sent. Now the time is in excess of 30 - 40 minutes. If I click on Send/Receive, it doesn't retrieve any messages. If I click on Calendar or another folder, the server will cough up any new messages that it may have stored. Is this a bug in Windows XP or Outlook 2000 sp-1. All my other machines are running Windows 98 and don't seem to have any problems like this.

The Exchange server is version 5.5 SP4 running on a Windows 2000 server.