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Exchange 2016 Autodiscover co-existing with Exchnage 2010 SP3.

In my test VM Lab after the install of Exchange 2016 I am having problems with the Outlook 2013 Client auto discovering the users on the new Exchange 2016 server. Only the users I have migrated are affected.

Tom Cieslik

Autodiscover should point to your email.yourdomain.com IP address
If you have 2 servers now, to witch one your autodiscover is pointing to ?

VIP Sharma

Did you point Autodiscover to the new server? Did you change any URLs to point to the new server? Are all URL settings on all virtual directories, Outlook Anywhere and Autodiscover configured properly?

Please Set AutodiscoverServiceInternalUri property to the correct Autodiscover URL on ALL CAS servers.

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Adam Brown

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Ajit Singh

Get complete overview about client connectivity in an Exchange 2016 Coexistence Environment with Exchange 2010: https://blogs.technet.microsoft.com/exchange/2015/10/26/client-connectivity-in-an-exchange-2016-coexistence-environment-with-exchange-2010/

Check this post which lets you how to configure Outlook 2016 to connect to Exchange:
https://kb.intermedia.net/article/20784

Here is another post for installing Exchange Server 2016 in co-existence with Exchange 2010:
https://www.frenchitguy.com/installing-exchange-server-2016-in-co-existence-with-exchange-2010/

Also get help from this earlier thread i.e. Exchange 2016 in coexistence with Exchange 2010 - Failed to connect Microsoft Outlook: https://social.technet.microsoft.com/Forums/office/en-US/4af98955-46e0-4927-a023-08748bf2aff0/exchange-2016-in-coexistence-with-exchange-2010-failed-to-connect-microsoft-outlook?forum=Exch2016CM

Hope this helps!