Last Updated on June 15, 2010 by GrahamWalsh
Thanks to Doug for this post which helped solve an issue I had with my virtual servers.
http://tincupsandstring.typepad.com/convergent-uc-blog/2009/03/cwa-sign-in-error-code-0-1-492.html
To get to the AuthMainCommandHandler.ashx file, I had to type in the address bar of IIS to be able to set the permissions for the file.