Omri Gazitt (whos blog is a
typical Microsoft one – very useful!) today posted how to (partially) get rid of the dreaded “Access Forbidden: Too many users are
connected Internet Information Service” error on IIS.

I've run into this error at the most inopportune of times – once we were
demoing our app (running on a notebook, with IIS in front of JRun 4). We
were plugged into the client's network, and they were mucking around with it
while we were demoing. Of course, We start having bloody “Access Forbidden”
errors, and have to try and explain WTF is going on (and why it's not a
problem on the real system) to a whole lot of people who were much more
interested in the app for what it did than the technology. Very
embarrassing!