Revoking user consent to an app
Logged in as the target user that you want to revoke app consent for, go to https://myapplications.microsoft.com
In the list of apps, find the app to remove consent from, for example, Enterprise Mail Handler (JEMHC)
Right click the app or open the “3 dot menu”, and select Manage your application
You will now be shown the permissions that you have consented to. To revoke your individual consent for the app, use the Revoke consent button