Recently I built some new IIS 7 server and realized that I had forgotten to include Windows Authentication as one of the modules during the initial install. No big deal, I’ll fire off a ServerManagerCmd command and then it will be available. So I opened a command prompt and ran the following:
ServerManagerCmd.exe -i Web-Windows-Auth
Now in theory, you would think that after doing this and opening up or refreshing Inetmgr that I would now see Windows Authentication as an option for my site. Wrong. What I found was that I actually had to run an old school IIS reset before I could get it to show up. So try restarting IIS if you run into this, it should take care of the issue and allow you to enable Windows Auth on your site.
