I've got a user in our office who upgraded to the iPhone 4S on launch day. He connects to our Exchange server for email, contacts, and calendar. Everything has been fine until this past week. Apparently, contacts that were originally created within Outlook/Exchange, and were synced to his iPhone........are now no longer in Outlook/Exchange. For example, his contacts on the iPhone are correct, but now they are missing on his Exchange mailbox. We've checked both his Outlook client and Exchange web mail. They aren't there. Has anyone seen this? I wanted to turn the Contacts button off, and then on, to force a new sync, but I didn't want to delete all of the contacts on the iPhone, since that appears to be the only place they exist now. Any thoughts?