Microsoft extends the Outlook naughty step with two more file types
Summary
Microsoft has expanded its list of blocked file types in Outlook to include .msix and .msixbundle. This move is intended to enhance security by preventing the transfer of potentially risky file formats through the email client.
IFF Assessment
FRIEND
This action by Microsoft enhances the security posture of Outlook by blocking potentially malicious file types, which is beneficial for defenders.
Defender Context
Defenders should be aware of this change in Outlook's file blocking policy. Organizations relying on Outlook for communication should ensure their internal policies align with these updates and that users understand the implications for file sharing.