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Hello Experts<br />
I have exchange server 2003 and users are able to sync with it but how that is happening is a bit of a mystery. &nbsp;Let me explain further.<br />
We have an old SBS 2003 server, server 1, that is going to be retired, and a new SBS 2003 server, server 2 that will take it's place. &nbsp;At this point, server 1 is still our web server and server 2 is now the exchange server. &nbsp;Our router has a rule to allow HTTP requests to go to server 1. &nbsp;ActiveSync in on server 2. &nbsp;On the mobile devices the ActiveSync server is set to exchange.server1.com.<br />
Now on the other hand, OWA does not work, eg <a href="http://www.server1.com/exchange" rel="ugc">www.server1.com/exchange</a>&nbsp;does nothing as expected. &nbsp;As a test I changed the OWA port to 440 and added a rule to allow 440 requests to go to server 2 and it worked as expected. <br />
So why is activesync working<br />
<br />
Thanks for your thoughts<br />
Mark G
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Hello Experts
I have exchange server 2003 and users are able to sync with it but how that is happening is a bit of a mystery.  Let me explain further.
We have an old SBS 2003 server, server 1, that is going to be retired, and a new SBS 2003 server, server 2 that will take it's place.  At this point, server 1 is still our web server and server 2 is now the exchange server.  Our router has a rule to allow HTTP requests to go to server 1.  ActiveSync in on server 2.  On the mobile devices the ActiveSync server is set to exchange.server1.com.
Now on the other hand, OWA does not work, eg www.server1.com/exchange does nothing as expected.  As a test I changed the OWA port to 440 and added a rule to allow 440 requests to go to server 2 and it worked as expected. 
So why is activesync working

Thanks for your thoughts
Mark G

Why is ActiveSync working

The Windows operating systems have distinct methodologies for designing and implementing networks, and have specific systems to accomplish various networking processes, such as Exchange for email, Sharepoint for shared files and programs, and IIS for delivery of web pages. Microsoft also produces server technologies for networked database use, security and virtualization.