I want to disable calendar & contacts for certain Microsoft 365 (i.e. Office 365 / Exchange) accounts. Want mail only. How can I do this?
You can’t if you are using Exchange Web Services as the protocol will sync the whole account with the server.
But you could setup the account as IMAP, using the manual setup. See the Documentation (F1) for instructions on how to set up an account manually.
Fair enough, thank you.