I recently had an issue of a user opening a zip file that had the Crypto virus. I was able to restore from backup and everything is back. So I went in to harden the rules a little on incoming attachment and I have gotten 365 to not allow normal executable's. The issue that I am having is that it is not scanning incoming zip files so you can get executable material in by zipping it, which is how it got in the first time. What do I need to do to get Exchange Online Protection to scan the incoming zip files?