Recommended Clients for Exchange Activesync for Exchange 2019 Mailbox Users

Hi Craig Unterborn,

I'm agree and disagree at the same time 🙂 

Outlook mobile app is compatible with pure Exchange OnPrem mailboxes:

https://learn.microsoft.com/en-us/exchange/clients/outlook-for-ios-and-android/outlook-for-ios-and-android?view=exchserver-2019

https://learn.microsoft.com/en-us/exchange/clients/exchange-activesync/mobile-devices?source=recommendations&view=exchserver-2019

But it's also true that there're limitations and auth concerns in such cases:

https://learn.microsoft.com/en-us/exchange/clients-and-mobile-in-exchange-online/outlook-for-ios-and-android/outlook-for-ios-and-android-faq

So, basically, even if you can perfectly use Outlook Mobile App with pure Exchange On Prem server, in my case I would agree with the other engineers and use the native apps. Let's see if someone else has a different opinion 😉