M365: Message Center Major Change Update Notification – More additional file types are getting added to BlockedFileTypesList in Outlook on the web

Hi All,

LIFE IS BEAUTIFUL 🙂 Today, I’ll share a news which Microsoft announced as MAJOR CHANGE UPDATE on 13 March 2020. Even though it appears in Message Center but sharing since messages can be missed from Message Center.

News : Updated Feature: Blocked file types in Outlook on the web

Details:

  • Microsoft will be adding some additional file extensions to the BlockedFileTypes list.
  • The BlockedFileTypes parameter specifies a list of attachment file types (file extensions) that can’t be saved locally or viewed from Outlook on the web.
  • This change will be rolled out in next month (April 2020) and will be finalized by end of next month.
  • Blocked file types are : .apk and .appx
  • Snap from Microsoft Roadmap : Microsoft 365 Roadmap ID 55100.
M365 - Microsoft Roadmap 55100 - Updated Feature: Blocked file types in Outlook on the web
Fig1: M365 – Microsoft Roadmap 55100 – Updated Feature: Blocked file types in Outlook on the web
  • If those files are already available in AllowedFileTypes list

How to see currently blocked File Types:

  • To see currently blocked file types, following are the steps:
  • Go to the Exchange Admin Center – https://outlook.office365.com/ecp/ OR we can also navigate from admin center as
M365 - Admin center >> Exchange - Navigating to Exchange Admin Center
Fig2: M365 – Admin center >> Exchange – Navigating to Exchange Admin Center
  • Once we are in “Exchange admin center”, please navigate the “protection” menu from left menus
  • On first tab “malware filter” we have default policy enabled as shown in below figure
 M365 - Admin center >> Exchange admin center >> protection >> malware filter >> Default Policy
Fig3: M365 – Admin center >> Exchange admin center >> protection >> malware filter >> Default Policy
  • Edit the default policy
  • Navigate to second tab “settings” as shown in below figure
  • Currently in my local tenant, “Common Attachment Types Filter” option is disabled.
  • If we turn on “Common Attachment Types Filter” this feature, we could see there “FILE TYPES” which are blocked 🙂
M365 - Admin center >> Exchange admin center >> protection >> malware filter >> Editing Default Policy
Fig4: M365 – Admin center >> Exchange admin center >> protection >> malware filter >> Editing Default Policy

References:

Stay tuned with more updates 🙂 HAVE A SAFE LIFE 🙂 TAKE CARE 🙂

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