Utilisez l'option $expand :
GET https://graph.microsoft.com/v1.0/me/messages('AAMkADA1M-zAAA=')/attachments('AAMkADA1M-CJKtzmnlcqVgqI=')/?$expand=microsoft.graph.itemattachment/item
Réponse :
HTTP/1.1 200 OK
Content-type: application/json
{
"@odata.context":"https://graph.microsoft.com/v1.0/$metadata#users('d1a2fae9-db66-4cc9-8133-2184c77af1b8')/messages('AAMkADA1M-zAAA%3D')/attachments/$entity",
"@odata.type":"#microsoft.graph.itemAttachment",
"id":"AAMkADA1MCJKtzmnlcqVgqI=",
"lastModifiedDateTime":"2017-07-21T00:20:34Z",
"name":"Reminder - please bring laptop",
"conte
