Understand the most common errors you may experience using the Forefront API.
Forefront uses conventional HTTP response codes to indicate the success or failure of an API request. In general: Codes in the
2xxrange indicate success. Codes in the
4xxrange indicate an error that failed given the information provided (e.g., a required parameter was omitted, authentication issue, etc.). Codes in the
5xxrange indicate an error with Forefront's servers (these are rare).