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Windows Server 2016 Issues Patching Domain Controllers

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Although new versions of Windows such as Server 2012 R2 and the upcoming Windows Server 2016 have been designed to recover from memory leak issues automatically, it is still recommended that you reboot affected domain controllers, which in turn might resolve other memory leaks issues that the OS is unable to resolve automatically.

windows server 2016 issues patching Domain Controllers

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Microsoft’s April 2025 Windows Server updates cause Kerberos authentication failures affecting Windows Hello for Business in enterprise environments. Learn symptoms, impact, and workarounds.

Which would be nice if they updated the official patch page. March 12, 2024—KB5035849 (OS Build 17763.5576) – Microsoft Support Known issues in this update Microsoft is not currently aware of any issues with this update. Microsoft has acknowledged a critical memory leak in the March 2024 Windows Server security update, which has caused widespread crashes among Windows domain controllers. The news comes a few days

Microsoft will release the February 2025 security updates. This is a critical update because Microsoft plans to enable full enforcement of strong certificate mapping on Active Directory Domain Controllers (DCs) with this release. Administrators unprepared for this may incur outages for workloads using certificate-based authentication Hi, I’m looking to automate the patching of the Active Directory Domain Controllers, but I don’t want to use an account that has unnecessary privileges. Is there a way to grant a user local administrator or similar on a Domain Controllers Server for limited purposed of managing only the OS and internals eg patching ? @Microsoft

Windows Server 2025 has hit a snag that could send ripples through countless enterprise networks by jeopardizing one of its most critical components—the domain controllers. Microsoft recently disclosed that following a restart, affected domain controllers might load the default firewall profile rather than the tailored domain firewall profile. This misstep disrupts Securing domain controllers against attack 07/09/2025 Applies to: Windows Server 2025, Windows Server 2022, Windows Server 2019, Windows Server 2016 So, same issue as in 2022 (KB5018419.) I had that issue, older versions of Windows Server would refuse to authenticate due to PAC changes from Microsoft for the KERBEROS keys. Finally updated my last 2016 server to 2019 last night and, now it’s doing the same thing – but back in the day the advice was remove the KB or make sure all servers are

The early days of summer should have brought a routine patch cycle for IT professionals managing enterprise networks with Windows Server. Instead, Microsoft’s June 2025 security update has triggered an unexpected crisis: a significant bug in the DHCP Server service, which is foundational to

Microsoft reveals cause of widespread Windows Server issue

Domain controllers get tough Admins should be on alert as Microsoft’s changes to certificate-based authentication on domain controllers Windows Server 2025 introduces several new features and security improvements for Active Directory, including a new functional level and the Database 32k Pages feature. To take advantage of these features, you must first upgrade all domain controllers (DCs) and migrate Active Directory to Windows Server 2025. Microsoft warned IT admins that some Windows Server 2025 domain controllers might become inaccessible after a restart, causing apps

  • Patching Domain Controllers without Domain Admin membership
  • Strong Certificate Mapping Enforcement February 2025
  • Domain controllers may experience high LSASS CPU usage
  • RDP issues after latest patches

Microsoft has explained in detail what broke Windows Server Kerberos authentication issues following Patch Tuesday updates and how to work around the bug.

A critical bug in Windows Server 2025 is causing Active Directory Domain Controllers (DCs) to become unreachable after every server restart. This issue, officially confirmed by Microsoft, results from the server applying the default (public/private) Windows Firewall profile instead of the required domain firewall profile upon reboot. A significant authentication failure surfaced following the deployment of April 2025’s Patch Tuesday updates—specifically, KB5055523 Hi, So yesterday a friend brought to my attention about the two latest KB updates that affect primary, servers setup as Domain Controllers and Microsoft Exchange. They tend to cause the servers to freeze, crash and then restart due to LSASS process memory leak. The only temp work around is to uninstall these updates. My question out of curiosity is if anyone has

As of March 22, 2024, Microsoft has expanded the support article Issue with Kerberos requests on domain controllers may cause LSASS memory leaks in the Know Issues section for various Windows Server versions to report the problem as „fixed“. The memory leak will be fixed by special updates that are only available via Microsoft Update

Microsoft is warning IT administrators that their Windows Server 2025 domain controllers (DC) may lose network connectivity after they are restarted. In a Windows release health dashboard update Redmond resolved another known Windows Server problem during this month’s Patch Tuesday, which caused some Windows Server 2025

Microsoft acknowledged a new issue caused by the June 2025 security updates, causing the DHCP service to freeze on some Windows

Update all servers that run Active Directory Certificate Services and Windows domain controllers that service certificate-based authentication with the May 10, 2022 update (see Compatibility mode). The May 10, 2022 update will provide audit events that identify certificates that are not compatible with Full Enforcement mode.

Microsoft has confirmed that last month’s Windows Server security updates may also cause domain controller reboots after the Local Security Authority Subsystem Service (LSASS) process crashes. Anyone else going grey from the RDP issues effecting servers from the recent patches. The reg key fix does not fix the problem for any of my team. I only observe reset packets to a domain controller during the rdp request. Removing the October and September CU’s from that DC, resolve the issue seemingly. My problem is that it appears totally random, I will have clients all Microsoft has addressed an LSASS memory leak issue on some domain controllers that led to freezes and restarts after installing Windows Server updates released during last month’s Patch Tuesday.

The recent April Patch Tuesday updates have brought an unexpected challenge for enterprise administrators and IT security In a recent announcement from Microsoft, detailed in the update KB5014754, significant changes concerning certificate-based authentication for Windows domain controllers were presented. This update affects several versions of Windows Server, including 2012 R2, 2016, and 2019, extending the scope to future versions like Windows Server 2022 and version

The LSASS memory leak issue affects Windows Server 2012 R2, Windows Server 2016, Windows Server 2019, and Windows Server 2022. On September 10, 2024, we updated article KB5014754 with changes that affect the timeline of security requirements for certificate-based authentication requests on Windows domain controllers. Microsoft has acknowledged that after the June 2025 updates for Windows Server, several users experience disruptions with the DHCP server service, particularly on versions such as Windows Server 2025 (KB5060842), Windows Server 2022 (KB5060526), Windows Server 2019 (KB5060531), and Windows Server 2016 (KB5061010).This problem could

Provides common resolutions to issues where you cannot open Active Directory snap-ins or connect to a domain controller from another computer. Additionally, discusses resolutions to errors in the DCDIAG tool.

Windows Server 2016 (KB5061010) Shortly after deployment across test and production environments, administrators began to notice DHCP-related issues almost immediately. Microsoft has addressed multiple critical issues affecting Windows Server 2025 domain controllers through its June 2025 Patch Tuesday updates, resolving authentication failures and network connectivity problems that have plagued administrators since April. Infosec in brief If your Windows domain controllers have been crashing since a security update was installed earlier this month, there’s no longer any need to speculate why: Microsoft has admitted it introduced a memory leak in its March patches and fixed the issue. Reports of the bug poured in across recent days as sysadmins reported Windows Server

Hi We have 4 Domain controllers upgraded to server 2025 and about 30+ still on 2022. The newly upgraded servers appear to have a bug where by any workstations going through them are unable to update their „pwdLastSet“ value and so after the 30 day limit on that field is hit they then fall into a trust relationship issue with the domain. For administrators and IT departments relying on Windows Server domain controllers, recent months have been marked by a tense waiting game following a critical network issue that affected the accessibility and reliability of Windows Server 2025 systems. Affected installations faced sudden