Unable to send large attachment using graph api

Question

Hello, I am getting error “invalid total bytes specified in the content-Range header”. While sending large attachments, the attachments <=3 MB works fine but for big attachment some times it doesn’t works.

Answer 1

Hello Alfonso Camara, Thanks for reaching out! From the error message it seems that the total bytes specified in the content-Range header is invalid. The Content-Range header has the following format:

Content-Range: bytes <startindex>-<endindex>/<totallength>

Your issue appears to be a mixing of indexes (0-based) and lengths (1-based). For a 100-byte file your header would need to look like:

Content-Range: bytes 0-99/100

Please check and validate if this issue still exists. Further reading on Attach Large Files Hope this helps. If the answer is helpful, please click Accept Answer and kindly upvote. If you have any further questions about this answer, please click Comment.