Introduction

Windows Server 2025 has introduced critical challenges affecting domain controllers and Remote Desktop Protocol (RDP) functionality. Administrators must understand these issues to implement effective mitigation strategies and maintain system security and stability.

Firewall Profile Misapplication on Domain Controllers

Issue Overview

After rebooting, Windows Server 2025 domain controllers may incorrectly apply the standard firewall profile instead of the domain firewall profile. This misconfiguration can lead to:

  • Network Accessibility Problems: Domain controllers may become unreachable within the domain network.
  • Service Disruptions: Applications and services dependent on these controllers may fail or be inaccessible.
  • Security Vulnerabilities: Ports and protocols that should be restricted remain open, increasing exposure to potential threats.

This issue is specific to Windows Server 2025 systems running the Active Directory Domain Services (AD DS) role. Earlier versions and client operating systems are unaffected. (learn.microsoft.com)

Temporary Workaround

Microsoft recommends manually restarting the network adapter on affected servers post-reboot using PowerShell:

CODEBLOCK0

Since the issue recurs after each reboot, automating this process via a scheduled task is advisable. This task should trigger the network adapter restart upon system startup, reducing manual intervention. (learn.microsoft.com)

Long-Term Resolution

Microsoft is actively developing a permanent fix for this issue, to be included in a future update. Administrators should monitor official channels for updates and apply patches promptly upon release. (learn.microsoft.com)

Remote Desktop Protocol (RDP) Freezing Issue

Issue Overview

Following the February 2025 security update (KB5051987), Windows Server 2025 devices may experience RDP sessions freezing shortly after connection. Symptoms include unresponsive mouse and keyboard input, necessitating session disconnection and reconnection. (learn.microsoft.com)

Resolution

This issue has been resolved in the April 2025 cumulative update (KB5055523). Administrators are advised to install this update to restore normal RDP functionality. (learn.microsoft.com)

Implications for Enterprise Environments

These issues underscore the importance of vigilant system monitoring and prompt application of updates. Failure to address these problems can result in significant operational disruptions, including:

  • Authentication Failures: Users may be unable to log in, affecting productivity.
  • Service Downtime: Critical applications may become unavailable, impacting business operations.
  • Increased Security Risks: Misconfigured firewall profiles can expose systems to unauthorized access and attacks.

Recommendations for Administrators

  • Implement Workarounds: Apply the network adapter restart workaround and consider automating it to minimize manual tasks.
  • Stay Informed: Regularly check Microsoft's official communications for updates and patches.
  • Test Updates: Before deploying updates broadly, test them in a controlled environment to ensure compatibility and stability.
  • Monitor Systems: Continuously monitor domain controllers and RDP services for signs of issues and address them promptly.

Conclusion

While Windows Server 2025 offers advanced features, these recent issues highlight the need for proactive management and adherence to best practices in system administration. By implementing recommended workarounds and staying updated on official fixes, administrators can mitigate risks and maintain a secure and efficient IT environment.