Graph api createUploadSession returns 401 on uploadUrl

Question

Hello,

This code has been running for 2 years, now it started to fail after we paid an unpaid subscription.
not sure it's because of that but here we are.

I am using a registered application to get the bearer token for this

after making a post request to this

"https://graph.microsoft.com/v1.0/users/{userPrinciple}/messages/{messageId}/attachments/createUploadSession"

I am getting back the response with the uploadUrl to put the chunks of the attachment

and using it to upload the chunks like

using (var httpRequest = new HttpRequestMessage(HttpMethod.Put, uploadUrl));> httpRequest.Content = new ByteArrayContent(body);> httpRequest.Content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");

httpRequest.Content.Headers.Add("Content-Length", $"{processingByteSize}"); httpRequest.Content.Headers.Add("Content-Range", $"bytes {completedByteSize}-{completedByteSize + processingByteSize - 1}/{attachmentBytes.Length}"); var response = await _client.SendAsync(httpRequest).ConfigureAwait(false);

but then I am getting Unauthorized response

Any luck what could be the reason?

Answer 1

We finally received both confirmation from Microsoft of the issue as well as an update on the fix in our support ticket:

The cause of the issue has been identified, and a fix has been rolled out. It is expected to be fully deployed by early next week. We apologize for the disruption this has caused.

Answer 2

My Service Provider escalated to Microsoft quickly for me.

It is a known issue for which they are currently working on a fix.