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On July 14, 2026, Microsoft released KB updates that conflict with the Active Directory (AD) Module in the Netwrix Activity Monitor product.
If these KBs are applied before updating the AD Module, certain NTLM Authentication and Kerberos Authentication events will no longer be captured.
Netwrix recommends delaying deployment of these KBs if your organization relies on these event types. The Netwrix development and QA teams are working on an updated AD Module compatible with these KBs and will send another notice when it is available.
Important Details
If your organization does not use Netwrix Activity Monitor for the following Active Directory activity event collection, or such events are not deemed important, you may elect to deploy the following Microsoft KBs in advance of the updated AD Module.
No other aspect of Activity Monitor operation is impacted by the July 14, 2026 KBs beyond what is described below. There is no adverse impact to domain controllers if the KBs are deployed without updating the AD Module.
Event Types Affected:
- Windows Server 2025 – Capture Kerberos Authentication activity
- Windows Server 2022 – Capture NTLM Authentication activity and Kerberos Authentication activity
- Windows Server 2019 – Capture NTLM Authentication activity and Kerberos Authentication activity
- Windows Server 2016 – Capture Kerberos Authentication activity
Severity:
MEDIUM
Affected Product: Netwrix Activity Monitor for Active Directory
Affected Systems:
- Windows Server 2025 (for Active Directory)
- Windows Server 2022 (for Active Directory)
- Windows Server 2019 (for Active Directory)
- Windows Server 2016 (for Active Directory)
Affected Microsoft KBs:
- Windows Server 2025 – KB5099536
- Windows Server 2022 – KB5099540
- Windows Server 2019 – KB5099538
- Windows Server 2016 – KB5099535
Impact:
Functional:
- Windows Server 2025 – KB5099536
- Loss of Kerberos Authentication activity capture
- Windows Server 2022 – KB5099540
- Loss of NTLM Authentication activity and Kerberos Authentication activity capture
- Windows Server 2019 – KB5099538
- Loss of NTLM Authentication activity and Kerberos Authentication activity capture
- Windows Server 2016 – KB5099535
- Loss of Kerberos Authentication activity capture
Stability:
No stability impact on any server platforms or domain controllers
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