Hello
I have to configure modern authentication in order to have a unify calender between exchange 2016 and MS team
I have already existing users on the cloud , i will use adconnect to match the users.
My users online have license with EXO , shall i disable it before we start the process for configure the modern authentication and add the spns to my azure ad?
what is the impact for delete the EXO license.
Note , my all mailboxes onprimise and the mailboxes on the cloud not used at all but i have doubt when i uncheck the license for EXO it will delete all the data for MS Teams.
My question shall i delete the EXO license in order to configure the modern authentication and unify the calendrer between onpromise and Exchange 2016?

