I have 2 user's only who have IPhone 4 that can't get their mail to sync. Calendar items come in just fine, so it's only email. when I use the Exrca I get the following error. I did check and the allow inherit permissions box is checked.
Attempting the initial sync to the Inbox folder. This initial sync won't return any data.
An error occurred while the Sync command was being tested.
Exchange ActiveSync command Sync failed with error code ServerError.