We have a new Verizon (4.2.6) iPhone that is having problems working with our Exchange server. During the add new account procedure, the phone properly autodiscovers the correct mail server name and authenticates properly, then goes to the "configuring sync" screen for a few moments and everything appears to be successful, but then the inbox appears totally blank and none of the other folders in that mailbox show up. The iPhone reports that it has synced successfully every time you tell it to manually sync, but no content appears in the box.
We have another identical Verizon iPhone that works just fine, so I don't think it's a server side issue. The only difference is that the one that works was a restored backup from a previous AT&T iPhone 4, whereas the non-working one is a new user with no previous usage or configuration.
On the non-working phone, I have the certificate authority setup with the root certificate authority, and I know that works properly because I can browse HTTPS to the exchange server's OWA page from the phone and that works just fine, and all of our server certs are signed by the same CA.
Thanks in advance!