Using: Windows Server 2003 domain w/Active directory, MOSS, WSS 3.0, IE 7, Windows XP
I recently created a group policy that allows users to access our SharePoint intranet without having to login. I did this by adding our intranet site to zone 1. (User Config-->Admin templates-->IE-->Internet Control Panel-->Security Page-->Site to Zone Assignment List) Then I changed the logon options under User Config-->Admin templates-->IE-->Internet Control Panel-->Security Page-->Intranet Zone to automatic logon only in intranet zone. It seemed to work like a charm.
HOWEVER...there was a side-effect I was not expecting. Now users cannot add sites to the Trusted Sites on their machines, and I did nothing to the trusted sites. Is this side-effect to be expected? How can I make sure users can add to trusted sites but still have the automatic intranet login apply?