Setup HMA with my exchange 2013 server. Windows Outlook and ActiveSync work fine. I'm using Google as my IDP. When I setup the native mail client on my Mac, it gets all the way through the authentication and when I click OK, it goes to a Gray screen and then just sits and spins. If I use an EXO account everything works fine. What would be causing the Mail app not to complete the login to my on-prem server but works fine with an EXO account?
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