so am I correct in understanding that since I am using Azure AD connect to sync users to 365, that I cannot remove my exchange 2013 server after migration is complete? or at least you cannot and be supported by MS.
I have read that one option is to virtualize your exchange server, as it will not need much in this new role, but what happens in a few years when 365 no longer supports exchange 2013, you have to purchase a license to keep sync going?