Direct push only partially working
Posted on 2007-11-15
We are running Exchange 2003 SP2. We have 10 users with windows mobile phones. We have a mix of PDA and Smartphones. We have a mix of Mobile 5 and Mobile 6. Lastly we have a mix of mobile connectivity, EDGE and 3G. We use AT&T wireless as our provider. The problem is, users on the 3G network are missing three things in reguards to Direct Push. All users on the Edge side of connectivity are working as normal / as they should be able to sync! What is missing is... the ability to set Activesync on the phone to 'As Items Arrive', Tasks are missing, and (while minor) picture's for contacts sync'd from Exchange show up in Outlook, but not on the phone.
The best I can point at is our Firewall. We have a Watchguard Firebox X 1250. The part that bewilders me is that Edge phones (2125, 3125, 8125) all sync just fine, new emails hit the phones within seconds. So I know we are setup correctly in Exchange, and on the phones. But there must be something that is causing phones running on the 3G network not to "talk" correcty to Exchange. Hence all the features are not avaliable. Amongst those phones are (8525, and the Pantech Duo)
I have tested a phone that does not work correctly, and connected it with an account at Mail2Web (a free hosted exchange account, that supports direct push) and low and behold it worked just fine. So, it isn't something on At&t's end! Any thoughts on what would cause a 3G phone not to sync with our Exchange server, while an Edge phone would work just fine? Thank you so much in advance!