I believe that is the only supported method currently.
No Application Access Policy found for this app
I have recently registered an application in Microsoft Entra admin center and have added the permissions required with the admin consent. I managed to generate a token by using just the tenant ID, client ID and client secret but it returns error "No Application Access Policy found for this app" when using the generated token to create a meeting on this endpoint https://graph.microsoft.com/v1.0/users/{tenant_id}/onlineMeetings
I understand in order to make requests without a signed-in user, we are required to configure the application access policy. Is there any other way to configure it without using PowerShell command?