Upgraded to Exchange 2003 SP2,now remote users can't access email

[rmhrc]

Hi
Since I've installed the exchange server service pack 2 on the server, the 2 sites that connect via VPN are no longer able to access their emails through Outlook. Previously this was fine. Now they get a 'server unavailable' message.

I'm assuming the installation has changed some setting, but I haven't a clue what. All seems ok to me in the settings.

Any experienced this, or have a solution?

Many thanks

 

[ShackDaddy]

Do they connect directly to the Exchange server with that VPN (is the server the VPN endpoint?) or are they coming in some other way (a VPN device or a VPN through another server) and then failing to reach the Exchange server over the VPN?

Is there any port filtering on the VPN? Is tcp/135 allowed?

Is the exact error "server unavailable" or is it "Unable to connect to the Exchange server"?

Lastly, there is a hotfix that is supposed to be installed before SP2.

http://support.microsoft.com/?kbid=898060

Without it, you may experience network connectivity issues.

ShackDaddy