Teams Meeting Join URL Validation

It appears Microsoft is going to start validating Teams meeting join URLs. 

Impact on Your Organization

  • Who is affected:
    • Organizations using security products that inspect or rewrite URLs, and users who join Microsoft Teams meetings via meeting links.
  • What will happen:
    • Microsoft Teams will validate join URLs to ensure they have not been modified.
    • If a join URL is rewritten or altered by a security product, it may be marked as malicious.
    • Users may be prevented from joining meetings if URLs are not in their original format.
    • This feature is enabled by default and does not require admin configuration.

We currently have URL rewrite protection active in Sophos. What should I do to ensure the URLs work and are safe. 



Edited TAGs
[edited by: Raphael Alganes at 2:30 PM (GMT -7) on 24 Jul 2025]