A little background, I have a SBS 2003 and exchange is on sp2. I have had Active Sync working for at least 2-3 years on windows mobile devices and over a year, since OS 2.0 release, with iPhones. My problem started sometime this past weekend. What actually happens is during the synch, my email/contact/calendar all become empty and eventually an error pops up stating "Cannot Get Mail - Server error. Contact your server administrator". To get some obvious things out of the way, the server is connected to the internet and does not go down. I have a metro-e 10 meg connection and I have no loss of service errors. My message store is not going down or being brought down. I have a Blackberry Enterprise Server, remote users using RPC over HTTPS and in office users that see no activity loss. Only the iPhones are being effected, but I can't test Windows Mobile because all of my users have moved to iPhones and don't have a device.
The crazy thing is that it only happens about every 4 synchs out of 10. The other 6 work without any problems and all the contacts/calendar/email reappear. This is really driving me nuts and I have spent way to much time trying to run down the source of the problem, but the iPhone does not give me any good information. Anybody have any ideas? All the iPhones have been upgraded to 3.0, but my personal was upgraded the beginning of last week and worked fine until Sunday or Monday of this week, so I don't think that is the problem. The only thing I am thinking it might be is that I am at my CAL license limit on my SBS 2003, but I would think I would see the problem elsewhere like desktops or remote users also. Any help would be appreciated.