Essentially, I'd like to know what email addresses I have permissions to send emails from. Is it possible to get this information via the REST API? E.g., my primary mailbox is fname.lname@live.com, but I've also added the alias fname.lname.test@outlook.com to this account and can send emails from both addresses.
Based on this post, I've tried using the GET: https://outlook.office.com/api/v2.0/me
API but it only returns the primary fname.lname@live.com address.