Permissions Required for Intune Client Apps to Communicate with App Portal

To establish connection between Intune and App Portal, the list of minimum permissions required for the Intune client app are:

Directory.ReadWrite.All
DeviceManagementApps.ReadWrite.All
DeviceManagementManagedDevices.Read.All

To configure these permissions

1. Navigate to API permissions > Add a permission > Microsoft Graph.
2. Click Application Permissions in the next section and use a filter to search for a specific permission.
3. Select the permission and click the Add Permission button.

This should add the selected permissions to the grid.

4. Finally click Grant admin consent for {Tenant Name}.