Windows System Event: 4823

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System Event » Windows System Event: 4823

Event ID 4823: NTLM authentication failed because access control restrictions are required.

Description NTLM authentication failed because the account was a member of the Protected User group.
Category Account logon
Subcategory Credential validation

This event logs the following information:

Account name -
Device name -
Error code -
Authentication policy information
  • Silo name
  • Policy name

Event 4823 applies to the following operating systems:

  • Windows Server 2012 R2 and 8.1
  • Windows Server 2016 and 10

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