Microsoft Graph API - Resumable upload returns 404 when uploading chunk [duplicate]
This question already has answers here : Resumable upload returns Unauthorized when uploading chunk (2 answers) Closed 2 years ago . Following the answer to this question I removed my Authorization header when uploading the first chunk of my resumable upload. So creating the session: POST https://graph.microsoft.com/V1.0/groups/a0aab702-8e58-4f25-b2dd-066e5d110f0c/drive/root:/10cb244a-d181-44df-aabc-51c30d4cf0f5.txt:/createUploadSession HTTP/1.1 Authorization: Bearer XXX Content-Type: application/json; charset=utf-8 Host: graph.microsoft.com Content-Length: 75 Expect: 100-continue { "item": {