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On March 10th 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 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 March 10th 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:
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 KB5078740
- Windows Server 2022 KB5078766
- Windows Server 2019 KB5078752
- Windows Server 2016 KB5078938
Impact:
Functional:
- 2025 Server – KB5078740
Netwrix Activity Monitor AD Module will lose the ability to capture Kerberos authentication activity.
Log: Couldn’t resolve I_GetASTicket - 2022 Server – KB5078766
Netwrix Activity Monitor AD Module will lose the ability to capture Kerberos authentication activity.
Log: Couldn’t resolve I_GetASTicket - 2019 Server – KB5078752
Netwrix Activity Monitor AD Module will lose the ability to capture Kerberos authentication activity.
Log: Couldn’t resolve I_GetASTicket - 2016 Server – KB5078938
Netwrix Activity Monitor AD Module will lose the ability to capture Kerberos authentication activity.
Log: Couldn’t resolve I_GetASTicket
Stability:
No stability impact on any server platforms or domain controllers.
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