The remote server returned an error: (401) Unauthorized

You're seeing the following error messages:

The remote server returned an error: (401) Unauthorized.

or

HTTP 401.2 - Unauthorized: Logon failed due to server configuration
Internet Information Services

or

HTTP 401.1 - Unauthorized: Logon Failed

This error is often seen when using SSL (i.e., https) and Windows Integrated Authentication.

The reason this error is appearing is because the user and/or ASP.NET user account does not have authority to access a file on the web server.

You can fix it by doing the following:

• Anonymous access may need to be added to the web application or at least some subfolders within the application. The ASP.NET user may need access as well. For example, the ~/workarea/controls/forms/ and ~/workarea/ewebeditpro/ folders contain XML and XSLT files that need to be accessible by the ASP.NET process. Configure IIS to allow anonymous access to these folders.
• The user should log in.
• See Ektron KB:
  /Knowledge_Base/Error/Permissions/401_error_using_Windows_Authentication_and_SSL_when_accessing_form_reports_in_the_workarea/