January 2022 Updates Prevent Netlogon Secure Channel Connections in Windows Server

Windows[German]The security updates rolled out by Microsoft on January 11, 2022, may cause an issue on Windows Server. Certain applications or devices may no longer be able to make Netlogon Secure Channel connections to Windows Servers after installing these security updates. This affects various server versions, Microsoft announced in a statement.


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Netlogon Secure Channel connections fail

In the Windows Server 2022 status area gibt es seit dem 24. Februar 2022 einen Eintrag Certain apps or devices might be unable to create Netlogon secure channel connections, there has been an entry Certain apps or devices might be unable to create Netlogon secure channel connections since February 24, 2022, describing the problem.

After installing KB5009555 [for Windows Server 2022] or any updates [for other Server versions] released January 11, 2022 and later on your domain controllers, scenarios which rely on Read-only domain controllers (RODCs) or synthetic RODC machine accounts might fail to establish a Netlogon secure channel.

RODC accounts must have a linked and compliant KRBTGT account to successfully establish a secure channel. Affected applications or network appliances, such as Riverbed SteelHead WAN Optimizers, might have issues joining domains or limitations after joining a domain.

The following Windows Server versions are affected by this issue (virtually all server versions that are still supported)

  • Windows Server 2022
  • Windows Server 2019
  • Windows Server 2016
  • Windows Server 2012 R2
  • Windows Server 2012
  • Windows Server 2008 R2 SP1
  • Windows Server 2008 SP2

Affected applications and network appliances will need an update from the developer or vendor to fix this issue. However, this update does not seem to be available yet, as Microsoft and Riverbed are currently investigating the issue and will provide an update as soon as more information is available.

Similar articles:
Microsoft Security Update Summary (January 11, 2022)
Patchday: Windows 8.1/Server 2012 R2 Updates (January 11, 2022), boot loop reported
Patchday: Windows 10 Updates (January 11, 2022)
Patchday: Windows 11 Updates (January 11, 2022)
Patchday: Updates for Windows 7/Server 2008 R2 (January 11, 2022)

Windows Server: January 2022 security updates are causing DC boot loop
Windows VPN connections (L2TP over IPSEC) broken after January 2022 update
Windows Server 2012/R2: January 2022 Update KB5009586 bricks Hyper-V Host


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Windows Out-of-band Updates fixes Jan. 2022 patch day issues (Jan. 17, 2022)
Windows 10/Server: Out-of-band Updates fixes Jan. 2022 patch day issues (Jan. 17, 2022)
Windows 11/Server 2022: Out-of-band Updates fixes Jan. 2022-Patchday Issues (Jan. 17, 2022)
Out-of-band Updates for Windows Server 2019 fixes Jan. 2022 Patch day issues (Jan. 18, 2022)


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