I use the Graph API to synchronize calendars with an app created from an Office 365 account (with a developper license).
I do user tests with an account outlook.com and hotmail.com (I log in oauth), all API calls work, however, as soon as I try to create a subscription with the endpoint "/subscriptions", the API returns this error:
400 - Specified resource is not supported for MSA requests
If I connect with an Office 365 user account, the API doesn't return an error.
How can my outlook, hotmail, live... users use my app with the endpoint "/subscriptions"?
Thanks