I need to configure hybrid environment for one of our client (exchange2016 on premissoffice 365)
Client is allready using office 365 couple months without hybrid connector(without Active Directory hybrid syncronization)
Client has 150 AD users on premisse and another 150 office 365 users separately.
If I configure hybrid environment do I need to delete office 365 users and start all over.He has 150 licence.
Any suggestions are welcome