Microsoft Teams: Block a user for your organization

Microsoft Teams is rolling out a block user feature to protect organizations from unwanted contact by malicious users. This feature will be available worldwide in early November 2024 and will be associated with Microsoft 365 Roadmap ID 411138. Admins will have the ability to block users, preventing 1:1 and group chats with them. The feature will be off by default and can be enabled in the external access settings. This new feature will leverage the allow/block list in federation identity credentials to block a malicious user from the entire organization, making it impossible for the user to reach out again. In the event that a blocked user has ongoing chats with the organization, they will be removed from those chats. Admins can add users to the block list by navigating to external access organization settings. It is important to note that the delete API does not prevent malicious users from resending a Teams message to the same victim.

If you are an admin, it is recommended that you activate this feature to protect your organization from unwanted contact from malicious users. The rollout will take place in early November 2024 and is expected to be completed by mid-November 2024. This post is associated with Microsoft 365 Roadmap ID 411138 and the message ID is MC888879.

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