Microsoft retired POP3 on 365 Accounts

Microsoft is slowly working through retiring (ie blocking) POP3 access to 365 Email accounts.

If I add 365 into eM Client, it says select services by ticking box. Unfortunately you can only select - Mail, contacts, calendar. Why can’t I just select email? I don’t want 365 calendar and contacts as I have GCal and GContacts synced everywhere.

Because the account is setup as Exchange, a single protocol syncs the entire account with eM Client.
Unfortunately that means you can’t select what sections sync with the server.

Just don’t use the Exchange Calendar and Contacts once the account is setup.