How to unblock a specific file extension - exchange online

Aran Billen 761 Reputation points
2024-06-27T09:52:47.32+00:00

Hi all,

How do I allow a specific file type which is being blocked by exchange online:

Screenshot 2024-06-27 at 10.48.30

Microsoft Exchange Online
Microsoft Exchange
Microsoft Exchange
Microsoft messaging and collaboration software.
454 questions
0 comments No comments
{count} votes

Accepted answer
  1. Vasil Michev 99,941 Reputation points MVP
    2024-06-28T06:10:35.2633333+00:00

    You will have to modify the Anti-malware policy to allow the file type, as detailed here: https://learn.microsoft.com/en-us/defender-office-365/anti-malware-protection-about#common-attachments-filter-in-anti-malware-policies

    In addition, you have to unblock the filetype in the OWA Mailbox policy assigned to the user(s) in question. You can only do this via PowerShell and the Set-OWAMailboxPolicy cmdlet: https://learn.microsoft.com/en-us/powershell/module/exchange/set-owamailboxpolicy?view=exchange-ps

    2 people found this answer helpful.

0 additional answers

Sort by: Most helpful