Windows Security Log Event ID 4891

Operating Systems Windows 2008 R2 and 7
Windows 2012 R2 and 8.1
Windows 2016 and 10
Windows Server 2019 and 2022
 • Subcategory
Object Access
 • Certification Services
Type Success
Corresponding events
in Windows 2003
and before

4891: A configuration entry changed in Certificate Services

On this page

Windows logs this event to document changes to Certificate Services registry entries many of which correspond to properties in the CA Properties dialog of Certification Authority MMC snap-in.

You can learn more about the various entries at

Node: the subkey path under HKLM\SYSTEM\CurrentControlSet\Services\CertSvc\Configuration\ca name

Entry: The registry value name

Value: the data of the value

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Description Fields in 4891

  • Node: %1
  • Entry: %2
  • Value: %3

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Examples of 4891

A configuration entry changed in Certificate Services.

Node: PolicyModules\CertificateAuthority_MicrosoftDefault.Policy
Entry: RequestDisposition
Value: 257

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