Exchange Error: Microsoft.Exchange.WebServices.Data.ServiceRequestException Rasmus Jensen Updated June 18, 2020 10:19 Follow ReasonInvalid Exchange Configuration SolutionCheck your Microsoft Exchange Configuration. Send a test email and if still not working contact your Exchange Provider Related articles Exchange Error: The request failed. The remote server returned an error: (404) Not Found / Invalid URI: The format of the URI could not be determined / The response received from the service didn't contain valid XML / The request failed. The underlying co Outlook Error: HRESULT: 0x80004002 (E_NOINTERFACE) Exchange Error: The request failed. The remote server returned an error: (401) Unauthorized / The request failed. The remote server returned an error: (404) Not Found How to use Office 365 Exchange Modern Authentication SMTP Error: System.Net.Mail.SmtpException (General) Comments 0 comments Please sign in to leave a comment.