I'm having a lot of problems applying security settings in local group policy for Outlook 2010.
I'm editing the following security setting for attachment handling:
User Configuration - Admin Templates - MSOutlook2010 - Security - Security Form Settings
I'm setting the Outlook...
I realise that this post is quite old, but I'm just wondering if you ever got this solved.
I too am experiencing exactly the same problem where I'm trying to add particular files to level 2 block extensions (for testing purposes). However I find that after doing gpupdate /force...