Obviously, Apple has revised the Mail app in the new iOS software as it has functionality that was not there before. The re-install shows that the problem was not caused by a faulty install of the app. I even now tried wiping the new iPhone 14 Pro and doing a full re-install of the OS to original factory and the same behavior continues. Also, the MS Outlook App on the iPhone works perfectly. However, new mails do NOT update on the app and outgoing mails do not work. The connection does in fact connect with both methods. I tried both methods for connecting the Apple Mail app to the Exchange server (entering email address and password for the automatic connect and the manual connect which points to the correct server). However, the Apple Mail app is not interoperating properly with the MS Exchange 365 server.
Currently the Apple Mail app works just fine with Exchange on my iPhone 12P and iPad Pro (neither of which have been updated yet to iOS 16). I have used MS Exchange 365 as my mail server with previous iPhones and iPads for years.
