Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
2 options:
You can either create 3 new rules, one each for user, group and contact, with a single scoping filter of MAIL ISNULL, and a single transform of CloudFiltered = True. This will set cloudFiltered to True (which prevents the object from syncing to the cloud) for any object where mail is null.
Or, you can clone the In from AD - User Join, In from AD - Group Join, and In from AD - Contact Join rules and add a clause to the existing scoping filter group of MAIL ISNOTNULL. This will only provision objects of those 3 types that have MAIL populated.