In both cases, I get the error message 'Unable to verify account information'. I am also not able to add a fresh account as well, so I don't think the problem is with my existing account(such that I should try removing it and adding it back again). Using a different set of DNS servers with my current Internet connectionĬonnecting with both SSL enabled and disabled in the advanced account settings of the account Resetting the network settings (which included a restart) Things which I have tried but failed to solve the problem: Mail app unable to connect with account Since about 9 hours ago, the native Mail app in my iPhone 5S (running iOS 12.5.4) is not able to connect to my email account using Exchange ActiveSync (which it successfully could earlier multiple times and this change happened all of a sudden without any configuration changes on my part). Fortunately for the moment the Outlook app for the phone is working 100% correctly with no problems. APPLE, PLEASE DO AN UPDATE AND FIX THE MAIL APP!!!!!!! By the way I confirmed with MS that they have done nothing to change Exchange 365, so it is not the fault of MS. It seems that when Apple changed the Mail app it created an incompatibility with Exchange. 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.

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