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Microsoft-Windows-Security-Auditing › Event 4823

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

Provider
Microsoft-Windows-Security-Auditing
Channel
Security
Opcode
Info

Description

NTLM authentication failed because access control restrictions are required.

Message #

NTLM authentication failed because access control restrictions are required.

Account Name: %1
Device Name: %2
Error Code: %3

Authentication Policy Information:
	Silo Name: %4
	PolicyName: %5

Fields #

NameDescription
Account_Name UnicodeString—
Device_Name UnicodeString—
Error_Code HexInt32—
Silo_Name UnicodeString[Authentication Policy Information] Silo Name.
PolicyName UnicodeString[Authentication Policy Information] PolicyName.
AccountName UnicodeStringAccount Name
DeviceName UnicodeStringDevice Name
Status HexInt32Error Code NTSTATUS reference
SiloName UnicodeString[Authentication Policy Information] Silo Name

Community Notes #

NTLM authentication was blocked by access control restrictions (authentication policy or silo).

The Status field is an NTSTATUS code:

CodeNameDescription
0xC000006DSTATUS_LOGON_FAILUREGeneric failure
0xC0000413STATUS_AUTHENTICATION_FIREWALL_FAILEDBlocked by authentication policy/silo

References #