TechSmith Relay (Self-Hosted): "HTTP Error 404.3" displayed when accessing the Relay web site

Attempting to log in to the TechSmith Relay web site after an installation of Relay shows an HTTP error of:

HTTP Error 404.3 - Not Found.
The page you are request cannot be served because of the extension configuration.
If the page is a script, add a handler. If the file should be downloaded, add a MIME map.

This can happen when the Camtasia Relay installer fails to properly register the ASP.NET extensions in IIS.  

  1. Press Windows Key + R  >> then type cmd
  2. Then type cd C:\Windows\Microsoft.NET
    • For 32bit installations of Windows Server, cd Framework
    • For 64bit, use cd Framework64
  3. Type cd v2.0.50727
  4. From within the v2.0.50727 directory, run the following command:
    • aspnet_regiis -i  
  5. Once ASP.NET has finished installing, please restart IIS by running:
    • iisreset