Outlook for iOS/Android not working on Exchange 2010

Paddy Maxson 1

Hi All, I've had a problem since mid last week where users can no longer access our Exchange 2010 SP3 servers using Outlook for iOS/Android. Activesync still works with the iOS MAIL app and GMAIL on android. Is this a known issue?

Eric Yin-MSFT 4,386 Reputation points

2021-03-30T01:59:34.703+00:00

Hi,
Exchange 2010 has been ended of support, it's suggested to migrate your server to Exchange 2016/2019/online ASAP.
Follow the guidance of Deployment Assistant to plan your migration: https://learn.microsoft.com/en-us/exchange/exchange-deployment-assistant?view=exchserver-2019
Does the issue occur with all users or some of them? What changes did you make last week? For Activesync troubleshooting, you can follow these links:
https://learn.microsoft.com/en-us/exchange/troubleshoot/client-connectivity/troubleshoot-activesync-with-exchange-server
https://msexchangeguru.com/2012/02/01/exchange-activesync/
However Activesync still works on Mail app, I suppose you should focus more on the Outlook app, what does it say when failed? Try updating the app to latest version and re-creating the account.
Eric Yin-MSFT 4,386 Reputation points

2021-04-02T05:35:31.607+00:00

I am writing here to confirm with you how the thing going now?
If you need further help, please provide more detailed information, so that we can give more appropriate suggestions.

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