HTTP response status codes

Applies to: Office 365

Microsoft web servers use HTTP Response Status Codes to communicate responses when processing requests.

For a complete description of HTTP Status Codes, see List of HTTP status codes.

The following table lists the most common status codes returned by Microsoft web servers.

HTTP status code HTTP status description Description
200 OK No error; the request is successful
201 Created No error; a new entity was created
202 Accepted No error; the request was accepted for processing
204 No Content Request succeeded, response is empty
400 Bad Request Invalid parameter passed
401 Unauthorized The request requires user authentication
403 Forbidden Use has insufficient access rights for the attempted operation
404 Not Found Invalid URI
405 MethodNotAllowed The method or content type requested is not supported
406 NotAcceptable The content type requested is not supported
410 Gone The requested entity no longer exists
415 UnsupportedMediaType The content type requested is not supported
429 Too Many Requests Rate limit exceeded
500 Internal Server Error Transaction failed
501 NotImplemented Request failed, future implementation is likely
503 Service Unavailable System unavailable; try again later

JSON reponses

For the format Microsoft follows when responding via JSON, see Error Responses in OData JSON Format Version 4.0 Plus Errata 02.

Response example

An error response might contain annotations in any of its JSON objects.

  "error": {
    "code": "501",
    "message": "Unsupported functionality",
    "target": "query",
    "details": [
       "code": "301",
       "target": "$search" 
       "message": "$search query option not supported",
    "innererror": {
      "trace": [...],
      "context": {...}