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MC807445 – Plan for Change: Inbound Access to Port 3389 Closed by Default for Windows 365 Cloud PCs

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check before: 2024-07-16

Product:

Entra, Intune, Microsoft 365 Apps, Windows 365

Platform:

Windows Desktop, World tenant

Status:

Change type:

Admin impact

Links:

Details:

Summary:
Starting July 2024, Windows 365 Cloud PCs will have port 3389 closed by default to enhance security. Organizations are advised to keep it closed but can manage access via Windows 365 Security Baselines or Intune custom Firewall rules if necessary. Reprovisioning will close open port 3389 on existing Cloud PCs.

Details:
In line with Microsoft's Secure Future Initiative, we are enhancing the security of Windows 365 Cloud PCs. Starting in July 2024, all newly provisioned Cloud PCs will have Transmission Control Protocol (TCP) and User Datagram Protocol (UDP) port 3389 closed by default via Windows Firewall. This change aims to provide better protection against potential cyber threats, such as man-in-the-middle attacks and ransomware, ensuring a more secure computing environment for our users. Therefore, Microsoft strongly advises keeping port 3389 closed to maintain these heightened security standards.

Change Category:
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Scope:
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Release Phase:

Created:
2024-07-02

updated:
2024-07-02

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Last updated 2 weeks ago

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