OWA thru single Front-End server and two back-end servers ( Problem for some users )
Posted on 2006-06-01
I have a two location setup. The main location has a Front-end server in a DMZ (172.16.1.5) and a Back-end server on the LAN ( 192.168.1.5 ). The remote location is connected via a VPN tunnel with one back-end server ( 192.168.2.5 ). The problem is this: Any users located on the remote Exchange server are unable to authenticate from the Internet when trying to use OWA on the Front-End server. While users from the main site Exchange server can login to OWA just fine from the Internet.
All subnets have full connectivity thru the VPN. All the back-end servers are Exchange 2003 SP2 Enterprise. The Front-end is 2003 Standard. OWA works if the remote server users access OWA on the remote server directly (192.168.2.5/exchange)
What could be the issue?