Name Collision in Active Directory Causes Replication Errors

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View products that this article applies to.

This article was previously published under Q281485

SYMPTOMS

The following error message may be displayed when you attempt to replicate changes between replica partners in the Active Directory Sites and Services tool:

The following error occurred during the attempt to synchronize the domain controllers. The naming context is in the process of being removed or is not replicated from the specified server.

You may also find event ID 1226 or 1265 in the System event log.

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CAUSE

This message indicates that CrossRef object deletion or re-creation left the computer in a state in which the new naming context name has a name conflict.

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RESOLUTION

Service Pack Information

To resolve this problem, obtain the latest service pack for Microsoft Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

260910 (http://support.microsoft.com/kb/260910/EN-US/ ) How to Obtain the Latest Windows 2000 Service Pack

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Hotfix Information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support (http://support.microsoft.com/contactus/?ws=support)

Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language. The English version of this fix should have the following file attributes or later:

   Date       Time    Version        Size      File Name
   --------------------------------------------------------
   3/7/2001   01:11p   5.0.2195.3330  155,408   Ntdsutil.exe
   3/7/2001   01:11p   5.0.2195.3330  155,408   Ntdsutil.exe

After you install this hotfix, restart the computer in Directory Service Restore mode, start a command (Cmd.exe) prompt, and then type the following lines, pressing ENTER after each line:

c:\ntdsutil
sem d a
go fix
q

You should see text that is similar to the following sample text to indicate a successful recovery:

c:\ntdsutil
c:\ntdsutil: sem d a
semantic checker: go fix
Fixup mode is turned on
Opening DIT database... Done.

Could not update "datatable" table: key already exists.
Could not retrieve "ATTk589826" column in "datatable" table: (warning) column is null.
Done.

Opening database [Current].....Done.

Getting record count...1744 records
Writing summary into log file dsdit.dmp.0
Records scanned: 1700
Processing records..Done.

semantic checker: q

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STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Windows 2000 Service Pack 3.

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MORE INFORMATION

For additional information about how to obtain a hotfix for Windows 2000 Datacenter Server, click the article number below to view the article in the Microsoft Knowledge Base:

265173 (http://support.microsoft.com/kb/265173/EN-US/ ) The Datacenter Program and Windows 2000 Datacenter Server Product

For additional information about how to install multiple hotfixes with only one reboot, click the article number below to view the article in the Microsoft Knowledge Base:

296861 (http://support.microsoft.com/kb/296861/EN-US/ ) Use QChain.exe to Install Multiple Hotfixes with One Reboot

For additional information about how to install Windows 2000 and Windows 2000 hotfixes at the same time, click the article number below to view the article in the Microsoft Knowledge Base:

249149 (http://support.microsoft.com/kb/249149/EN-US/ ) Installing Microsoft Windows 2000 and Windows 2000 Hotfixes

For additional information about how to restart your computer in Directory Service Restore mode, click the article number below to view the article in the Microsoft Knowledge Base:

202485 (http://support.microsoft.com/kb/202485/EN-US/ ) Description of Safe Boot Mode in Windows 2000

When the problem that is described in this article occurs, you may see the following entries in the event logs:

Event Type: Warning
Event Source: NTDS KCC
Event Category: Knowledge Consistency Checker
Event ID: 1265
Date: 7/25/2000
Time: 11:06:15 AM
User: N/A
Computer: SRV1
Description:
The attempt to establish a replication link with parameters
Partition: DC="CHILD
CNF:318498a8-8c57-46e3-b226-3693f7719162",DC=DOM2,DC=com
Source DSA DN: CN=NTDS
Settings,CN=SRV2,CN=Servers,CN=SITE2,CN=Sites,CN=Configuration,DC=CHILD,DC=DOM1,DC=net
Source DSA Address:
cabc8641-9a94-41d9-bf9a-56f43b67006a._msdcs.child.dom1.net
Inter-site Transport (if any): CN=IP,CN=Inter-Site
Transports,CN=Sites,CN=Configuration,DC=child,DC=dom1,DC=net
failed with the following status:
Logon Failure: The target account name is incorrect.
The record data is the status code. This operation will be retried.
Data:
0000: 74 05 00 00 t...

Event Type: Information
Event Source: NTDS Replication
Event Category: Replication
Event ID: 1226
Date: 06/11/2000
Time: 6:10:32 PM
User: Everyone
Computer:YOURCOMPUTERNAME
Description:
The object
CN=YOURCOMPUTERNAME,CN=Servers,CN=Default-First-Site,CN=Sites,CN=Configuration,DC=YOURDOMAINNAME ,DC=com (with objectGuid 793c9a19-94ee-4713-b154-9a7f7d81b4a0) was created on a remote server. However, this name is already in use here by the object with objectGuid 980563ba-c29c-4638-ad40-3d0574c925b0. The object with objectGuid 980563ba-c29c-4638-ad40-3d0574c925b0 will be renamed to YOURCOMPUTERNAME CNF:980563ba-c29c-4638-ad40-3d0574c925b0, since the other object claimed the name first.

Note that the GUIDs listed in these entries may vary.

You can use Ntdsutil to obtain the following information that shows the conflict in the names. Look for the lines beneath "Found 2 domain(s)".

Using Ntdsutil while connected to server 1 in the root domain lists:

c:\>ntdsutil
ntdsutil: metadata cleanup
metadata cleanup: connections
server connections: connect to server servername1
Binding to servername1 ...
Connected to servername1 using credentials of locally logged on user
server connections: quit
metadata cleanup: s o t
select operation target: l d
Found 2 domain(s)
0 - DC=firstdomain,DC=com
1 - DC="seconddomain
CNF:9b9fbae4-7ba8-45b3-bb6c-71b94c37779a",DC=com
select operation target: select domain 1
No current site
Domain - DC="seconddomain
CNF:9b9fbae4-7ba8-45b3-bb6c-71b94c37779a",DC=com
No current server

Using Ntdsutil while connected to server 2 in the peer domain lists:

H:\>ntdsutil
ntdsutil: metadata cleanup
metadata cleanup: connections
server connections: connect to server servername2
Binding to servername2 ...
Connected to servername2 using credentials of locally logged on user
server connections: quit
metadata cleanup: s o t
select operation target: list domains
Found 2 domain(s)
0 - DC=firstdomain,DC=com
1 - DC=seconddomain,DC=com
select operation target: select domain 1
No current site
Domain - DC=seconddomain,DC=comDescription of Safe Boot Mode in Windows 2000

In this example, the root domain shows the incorrect name:

Found 2 domain(s)
0 - DC=firstdomain,DC=com
1 - DC="seconddomain
CNF:9b9fbae4-7ba8-45b3-bb6c-71b94c37779a",DC=com

The peer domain shows the correct information:

Found 2 domain(s)
0 - DC=firstdomain,DC=com
1 - DC=seconddomain,DC=com
select operation target: select domain 1

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