Aug 11 2019 06:10 AM
When enabling a default setting in "Microsoft Edge - Default Settings (user can override)" policies (e.g. "Block third party cookies") the setting can be changed in the normal Edge settings (as expected).
When starting an Application Guard window the setting is grayed out and can't be changed from the policy's default value.
Aug 29 2019 04:40 PM
You may want to consult on this discussion channel for this: Microsoft Edge Insider Enterprise Discussion.
Gabriel