Event ID 12303 — Account Integrity

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Applies To: Windows Server 2008 R2

The Security Accounts Manager (SAM) is a service that is used during the logon process. The SAM maintains user account information, including groups to which a user belongs. The SAM checks for duplicate accounts and duplicate security identifiers (SIDs).

Event Details

Product: Windows Operating System
ID: 12303
Source: SAM
Version: 6.0
Symbolic Name: SAMMSG_DUPLICATE_SID_WELLKNOWN_ACCOUNT
Message: There are two or more well known objects that have the same SID attribute in the SAM database. The Distinguished Name of the duplicate account is %1. The newest account will be kept, all older duplicate accounts have been deleted. Check the event log for additional duplicates.

Resolve

This is a normal condition. No further action is required.

Account Integrity

Active Directory