We use the Intune cloud to manage serveral mobile devices.
We set the value of [Intune App Protection] - [policy settings] - restrict cut, copy and paste with other app to policy managed apps and target the policy to the outlook application (iOS).
Unfortunately the policy rules are not active since we are able to copy tekst from the "managed" Outlook app to the (e.g.) reminder native application. This should be restricted since we applied te policy. The testusers are member of the assignment groups ;).