How to: add any filetype to your anti-malware policy

It is easily to select some filetypes to block for inbound email in an Exchange Online anti-malware policy. But what if the filetype you want to block is not listed? I will explain in this post how to block them.

Why are users allowed to access the quarantine?

This is a question I regularly get. In this post I will explain Microsoft’s way and share my opinion on this.