Outlook plug fails to connect and the debug logs are showing the following error:
OutlookAddInCore","Error: Failure whilst performing Web Service Version with error: System.ServiceModel.ProtocolException: The remote server returned an unexpected response: (400) Bad Request. ---> System.Net.WebException: The remote server returned an error: (400) Bad Request.
- GFI MailEssentials
- Outlook plugin
- All Supported Environments
- Open the IIS Manager
- Locate the website with the MailEssentials_Service Virtual Directory
- Select the HTTP Redirect
- Uncheck the redirect if applicable
- Perform an IIS reset and retest the connection
HTTP redirect in IIS is not allowing the authentication to occur with the MailEssentials_Service. Disabling the redirect allows the connection to complete.