How to ask OnlineMeetings.Read.All App scope on Graph ?

Question

Hello,

I got some troubles with this app scope.
It seems that Graph does not accept granting the OnlineMeetings.Read.All App scope :

https://login.microsoftonline.com/organizations/v2.0/adminconsent?client_id=<masked>&redirect_uri=<masked>&scope=offline_access+OnlineMeetings.Read.All&prompt=admin_consent&state=v-0-0-0

Here is the error message obtained :

error: invalid_client
error_description: AADSTS650053: The application '<masked>' asked for scope 'OnlineMeetings.Read.All' that doesn't exist on the resource '00000003-0000-0000-c000-000000000000'. Contact the app vendor. Trace ID: f0a8502a-44bf-45ed-a8ca-b9d2f7a13e00 Correlation ID: f6e517c2-3c15-4e3a-b678-b64d0244774e Timestamp: 2025-03-07 14:15:50Z

Yet the scope 'OnlineMeetings.Read.All' is well set the App registration.

However, there's no problem to ask a scope like Contacts.Read :

https://login.microsoftonline.com/organizations/v2.0/adminconsent?client_id=<masked>&redirect_uri=<masked>&scope=offline_access+Contacts.Read&prompt=admin_consent&state=v-0-0-0

Thanks for your help,
Arthaud