This is a fresh/clean installation of both Server 2008 R2 and Exchange 2007 SP3, about as vanilla as it can get.
On the default web site (the one that shows the IIS7 logo screen) and in fact any directory under that one, after installing Exchange the root site and all the sub-directories all 'fail' with 403 "Forbidden" errors whereas they were all working fine prior to installing Exchange.
Other root sites on the same IIS server still work fine. It's just the 'default' site (the one where the Exchange installation added all of its stuff, where the CA lives, etc) that is having the problem.'
What's up with this?
Thanks.