Event ID 12303 — Account Integrity

Applies To: Windows Server 2008

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
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.


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

Account Integrity

Active Directory