I'm using Microsoft Graph API to get my Office365 emails via /me/messages. I try to fetch the attribute for if it is sent or received.
Some other members noticed me about this extended property: https://docs.microsoft.com/en-us/office/client-developer/outlook/mapi/pidtagsentmailentryid-canonical-property
So I tried to GET it via: https://graph.microsoft.com/v1.0/me/messages?$select=ReceivedDateTime,Sender,Subject,IsRead,parentFolderId,&$expand=SingleValueExtendedProperties($filter=(Id eq 'Binary 0x0E0A'))
But unfortunately, I don't know how to access the extended property now. It is not visible within the Message object itself. If I dump a sent mail, the object looks like all other message objects and I can't find any more informations as without the $expand parameter.
What I'm doing wrong here? How can I access the PidTagSentMailEntryId property?