Question : Iphone Can't get Exchange mail on LAN but ok on 3G.

Hello,
We have a exchange 2003 sevrer and a OWA 2003 server as well.
When the domain was installed whoever installed it named it mycompany.com
Our exchange server is owa.mycompany.com.
This is the setting people put in their iphone to get exhcnage mail when they are on 3g. When they come to work and connect to our internal wifi, the mail server does not connect. So i tried adding a different dns record called owa1.mycompany.com and pointed it to the outside public address. The phones still do not like this and will not connect when they are in our wifi zone.
I know calling the domain the same thing as our websites, email servers etcc is wrong but i did not set it and changing it is not a option.
Thanks in advance.

Answer : Iphone Can't get Exchange mail on LAN but ok on 3G.

OK, let me try and explain this again.

If when not connected to the wifi the servername you use on the iphone is:

owa.domainname.com then this will be an A record in your external DNS pointing to the external IP address of the Exchange Server.

owa.domainname.com above is just an example, you will need to check your phone for the exact servername.

So on your internal DNS, you need to create a forward lookup zone that is the same as the above, so if the above is owa.domainname.com you create a forward lookup zone for owa.domainname.com then you create a blank A record and point it to the INTERNAL IP address of your Exchange Server.

It's pointless pointing it to the external IP address because this will not work, this is why it's not working at the moment because most routers are designed to block these sorts of loops.