Introduction

Windows Server 2025, Microsoft's latest server operating system, has recently encountered significant challenges following recent security updates. Notably, issues with firewall profile misconfigurations and Remote Desktop Protocol (RDP) session freezes have emerged, impacting enterprise environments reliant on these services.

Firewall Profile Misconfiguration in Domain Controllers

Issue Overview

After system restarts, Windows Server 2025 domain controllers have been observed to incorrectly apply firewall profiles. Instead of loading the domain firewall profile, which is essential for secure domain network operations, the servers default to the standard public firewall profile. This misconfiguration can lead to:

  • Domain controllers becoming inaccessible on the domain network.
  • Failure of applications and services dependent on these controllers.
  • Exposure of network ports and protocols that should be restricted, posing security risks.

This behavior disrupts critical Active Directory functions, including replication, Group Policy application, and user authentication, potentially destabilizing the entire domain environment.

Affected Systems

This issue specifically affects Windows Server 2025 systems running the Active Directory Domain Services (AD DS) role. Earlier versions of Windows Server and client operating systems are not impacted.

Temporary Workaround

Until a permanent fix is available, administrators can manually restart the network adapter to enforce the correct firewall profile:

CODEBLOCK0

To automate this process, creating a scheduled task that triggers the network adapter restart after every reboot is recommended. This ensures the correct firewall profile is applied consistently. (learn.microsoft.com)

Remote Desktop Protocol (RDP) Session Freezes

Issue Overview

Following the installation of the February 2025 security update (KB5051987), Windows Server 2025 users have reported RDP sessions freezing shortly after connection. Symptoms include:

  • Mouse and keyboard inputs becoming unresponsive within the session.
  • Necessity to disconnect and reconnect to regain functionality.

This issue significantly hampers remote management capabilities, a critical function for IT administrators.

Resolution

Microsoft addressed this issue in the April 2025 cumulative update (KB5055523). Administrators are advised to install this update to resolve the RDP freezing problem. (learn.microsoft.com)

Implications for IT Administrators

These issues underscore the importance of balancing security updates with system stability. IT administrators should:

  • Conduct Thorough Testing: Implement updates in controlled environments before widespread deployment.
  • Monitor Official Communications: Stay informed through Microsoft's official channels for updates and advisories.
  • Implement Workarounds Prudently: Apply temporary solutions while awaiting permanent fixes, ensuring minimal disruption to services.

Conclusion

While Windows Server 2025 introduces advanced features and security enhancements, recent updates have presented challenges requiring prompt attention. By staying informed and proactive, IT administrators can navigate these issues effectively, maintaining the integrity and reliability of their server environments.