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office 365 exchange 2010


We are trying to migrate out of our exchange 2010 to office 365.  I have migrated all the data and webmail office 365 is working with no issues.. When I installed outlook2016 and tried to connect to the email (from any of the workstation), outlook keeps trying to connect to the on premis exchange server.  

I have stopped all the exchange services on the server but did not shut it down since it also functions as our primary domain controller.  I am sure there is probably some dns entries that i will need to delete or maybe add a conditinal forwarder for autodiscover.outlook.com?  

When I set the workstation dns to an external dns server I have no issues with outlook it connects to office 365, but I cant do that on a permanent basis since users needs to authenticate.
2 Solutions
Vasil Michev (MVP)Commented:
That same issue has been discussed probably a hundred times on EE alone - look it up. In a nutshell - remove any internal Autodiscover endpoints, including the SCP one. Or use client-based "override" as detailed here: http://support.microsoft.com/kb/2212902

All you need for O365 connectivity is the CNAME entry pointing to ExO, you can remove/block all other methods.
Todd NelsonSystems EngineerCommented:
Set the AutoDiscoverServiceInternalUri to null.

Look at this reference ... http://jetzemellema.blogspot.com/2015/10/how-to-remove-exchange-autodiscover-scp.html
Seth SimmonsSr. Systems AdministratorCommented:
No comment has been added to this question in more than 21 days, so it is now classified as abandoned.

I have recommended this question be closed as follows:

-- Vasil Michev (MVP) (https:#a42398094)
-- Todd Nelson (https:#a42399901)

If you feel this question should be closed differently, post an objection and the moderators will review all objections and close it as they feel fit. If no one objects, this question will be closed automatically the way described above.

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