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.