The title pretty much says it all.
We block all browser plug-ins via GPO with specific exceptions. Unfortunately, I have been unable to find a definitive list of what Brower Add-Ons MUST be enabled for OWA to function correctly.
If anyone can tell me even just which add-ons are required, I'll happily search out the CLSID's on my own!
We have a select few user accounts that don't apply the IE Add-On restricting GPO, and they can access and utilise OWA without any problem. Users who are not blocked from applying that GPO, and who use Vista or Windows 7 encounter Browsing Errors whenever they try to make use of OWA, especially when replying or trying to set/view Options.
Additionally, the problem does not appear to manifest on XP, regardless of whomever is trying to access OWA.
Anyway, if I add the affected users to the global group that prevents them from applying the GPO, and then update their group-policies, the problem disappears. The downside being that doing so essentially obviates our intention to restrict access only to specific IE Add-Ons.