I have an SBS 2003 running Exchange 2003 SP2. We use Outlook Web Access, RPC over HTTP(s) plus several users have phones that sync up with Exchange. We have a certificate that we purchased through GoDaddy. Things seem to work OK most of the time, except some of the Verizon / ActiveSync phones will not connect on occasion. For example, one day or sometimes two days in a week, the phone will not get any updates. Then it will work fine for several days. We used to think it was the weekend, but it doesn't always stick to that. I've had a hard time tracking down specific error messages on the server. On the phone, it says that the Server could not be reached which may be caused by temporary network conditions. Error 0x85002003. Blackberry phones don't seem to have this problem at all. They do re-verify their credentials, but always seem to be able to sync. Any ideas??