Exchange 2003 with Outlook 2003 - Takes like 5 mins to sync - Ports over VPN

We have just had a new Exchange 2003 server implemented to replace the old 5.5 one however its now taking a good 2-5 mins for everything to sync up and outlook to say "connected". Once its connected everything is quick but before then we've this massive wait.

TCP ports 135, 5000, 5001, 5002, and 5003 have been open on our Cisco VPN Concentrator.

the netstat command on my machines show an aweful lot of TIME_WAITs to the Exchange server on port 5000. Any ideas if we could open up some ports to speed the damn thing up?

Its fine when in the office. Help greatly appreciated. Exchange 2003 with Outlook 2003 - Takes like 5 mins to sync - Ports over VPN

 

 

 

 

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