Anti-malware policy : Common attachment filter : Additional file types block by default
The ‘Common attachment filter’ option in the ‘Anti-malware’ policy helps the Administrator configure the file types (based on file extension) which need to be blocked in the emails. This block action is applied anytime the file type of any attachment in the email matches this configurated file type list.
The current pre-configured list has 96 file types. Of these 96 file types, 10 files types are selected by default in the block list. When a new policy is created, these 10 file types are selected, to be blocked, by default. Administrator can make changes to this selection by selecting more file types or making changes to existing file types. If the Administrator chooses to extend this behavior to more file types, then this is possible using PowerShell option.


HANDS ON tek
M365 Admin






