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Event ID 519 — Active Directory Integration

Updated: December 3, 2008

Applies To: Windows Server 2008 R2


Windows Deployment Services depends on Active Directory Domain Services for various functions. The Pre-Boot Execution Environment (PXE) provider creates machine accounts and service control points (SCPs) in Active Directory. An SCP is a child object under a Windows Deployment Services server account object, and it is used to store configuration data for the server. For example, an SCP can mark the server as a Windows Deployment Services server so that other Windows Deployment Services servers can find it.

Event Details

Product: Windows Operating System
ID: 519
Version: 6.1
Message: Multiple machine accounts with the same GUID or MAC address were found in Active Directory Domain Services. The Windows Deployment Services server will use the first listed machine account.

MAC Address: %1
GUID: %2

List of matching machines: %3


Delete a duplicate machine account

Each globally unique identifier (GUID) can have only one machine account in Active Directory Domain Services. To resolve this issue, delete one of the duplicate accounts.

To perform this procedure, you must either be a member of the local Domain Admins group or have been delegated the appropriate authority.

To delete a duplicate account:

  1. On the server that contains Active Directory Domain Services, open Active Directory Users and Computers.
  2. Using the GUID that is specified in the event log message, search in Active Directory Users and Computers for the multiple accounts. To do this, you will first need to change the format of the GUID to a format that you can use in a Lightweight Directory Access Protocol (LDAP) query. For information about how to do this, see step 1 in the Workaround section at http://go.microsoft.com/fwlink/?LinkId=135689. Note: To find the event log message, open Event Viewer. expand Custom Views, expand Server Roles, click Windows Deployment Services, and then find BINLSVC event 519.
  3. Review the accounts, and select the one you want to keep.
  4. Delete the other accounts.


To perform this procedure, you must either be a member of the local Domain Admins group or have been delegated the appropriate authority.

To ensure that there is a service control point (SCP) in Active Directory:

  1. Open Active Directory Users and Computers. (Click Start, click Administrative Tools, and click Active Directory Users and Computers)
  2. Browse to the computer account for the Windows Deployment Services server.
  3. Right-click the server, and then click Properties.
  4. Ensure that there is a Remote Install tab with the introductory sentence "You can manage this remote installation server."  The presence of this tab indicates that there is an SCP for this object.

Related Management Information

Active Directory Integration

Windows Deployment Services

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