The Outlook Calendar Integration requires two Outlook permissions:
- Calendars.ReadWrite
- Place.Read.All
Our integration uses application-only authentication (client credentials) and does not sign users in or access any user profile data. But because we use a multi-tenant application, Microsoft automatically lists a third permission in the Admin Grant Screen, the modal where your Outlook Admin grants permissions to the integration. This extra permission is the "Sign in and read user profile" item in the modal, representing the User.ReadBasic.All and User.Read.All permissions.
The Outlook Calendar Integration does not use the User.ReadBasic.All or User.Read.All permission. Your Outlook Admin can remove these permissions without impacting the integration.