Issue Description:

Currently as per the latest update, all the external users who can now access sites using Mobile apps which was previously restricted when External User Security feature was Turned ON in the Admin Hub UI.

Now, with this change as the users can access via Mobile apps and these users cannot be restricted from logging in from mobile apps and so the admins cannot have control of this which was previously available.

Requested Suggestion:

An option to exclude external users from logging in via Mobile apps should be included either in the MDM policy or having a separate IP allowlist ignore check for external users or a block option within that policy.