I want to prevent users from downloading or exporting items in any way from archive explorer (internet browser), I want just them to read the mails the have archived. I have been testing with policies but I couldn't find a way to do it. Can anybody help?
I am not sure THIS article will help, or assist in achieving the goal, but it is a start..
The article lists (as example):
ArchiveExplorerRestore set to "0" disables both Copy and Move menu options.
ArchiveExplorerDelete set to "0" disables both Delete and Move options.
Also see THIS article, which describes what you are after I believe. Keep in mind that changing the mentioned file affects ALL users, not just a few. I would test either after hours, or in a test setup..