In searching the Microsoft Graph API documentation I have been unable to find any documentation on any APIs that would allow me to get the "Send as" or "Send on behalf of" settings for an Office 365 mail user.
I'd like to fetch these prior to sending an email so that my application can allow users to choose which emails to send from.
Anyone have any insight as to if this information is behind any of the v1.0/beta graph APIs or whether it is just completely unavailable.
Here's the documentation for how Microsoft informs users how to set up send-as aliases https://docs.microsoft.com/en-us/office365/admin/add-users/give-mailbox-permissions-to-another-user?redirectSourcePath=%252farticle%252fSend-email-from-another-user-s-mailbox-in-Office-365-2B828C5F-41AB-4904-97B9-3B63D8129C4E&view=o365-worldwide#bkmk_sendemailanotheruser