I need to write an app that will read messages in several shared mailboxes.
https://graph.microsoft.com/v1.0/users/[email protected]/messages
This request is sent with the authorization token. Works perfectly for me. The shared mailbox belongs to me as well. However:
https://graph.microsoft.com/v1.0/users/[email protected]/messages
Always return 403 Unauthorized. Is it even possible? If not, what are the alternatives?