Trying to solve yet another problem with running online training on my work laptop. You'd think that they didn't want me to take the training. The current error produced a message to the effect of an untrusted application was blocked. The training site's own documentation says that it has to be a trusted site in order to work, but thanks to the group policy on my system, I can't even check the IE properties to see if the training site is a trusted site, much less change it. As expected, I was able to at least find out the answer through the registry so that I could put more information in my problem report to IT.
This q&a describes my exact problem very precisely, but the answers given seem to be crap. At least I learned that something called GPResult exists (it didn't quite work when I tried it as shown), and one of the answers gives the trust values that correspond to each numerical value setting:
http://superuser.com/questions/414097/how-to-view-all-ie-trusted-sites-when-security-settings-are-managed
This site also didn't work out as hoped, it seems to be from a remote seat management perspective, but I began learning that what I need would be under a key named EscDomains:
http://nefaria.com/2009/10/adding-trusted-sites-for-ie-via-the-registry/
There was another google hit, that I've lost the list to, which gave me the idea of just using the search function in regedit to find all EscDomains keys and viola, it gave me the list of trusted sites.