Microsoft Graph API: 400 when using "invite" endpoint

Question

I want to send an invitation by mail to customers, so they can download a file from our SharePoint. The request is like this:

https://graph.microsoft.com/v1.0/sites/{{siteId}}/drives/{{driveId}}/root:/Prueba/prueba.txt:/microsoft.graph.invite

With body:

{
  "recipients": [
    {"email": "[email protected]"},
    {"email": "[email protected]"}
  ],
  "message": "Download your file",
  "requireSignIn": true,
  "sendInvitation": true,
  "roles": [ "read" ]
}

If I fill up "recipients" with mails from the organization, everything goes ok.

But when I use external mails (gmail, hotmail, other companies mails, etc), the response is 400 with this body:

{
    "error": {
        "code": "invalidRequest",
        "message": "The request is malformed or incorrect.",
        }
    }
}

I suppose we need to configure our SharePoint in a certain way, but Microsoft support couldn't help us. Could anyone suggest any solution?

Thanks!

Answer 1

You can use the other mail Accounts like gmail,yahoo etc in the recipients property but before that you need to modify your site setting. Go to Sharepoint Admin Center--> Sites --> Active Sites --> Select the site which you are using and click on the 3 dots just below "Active sites" heading and select sharing and make it anyone.