Microsoft KB Archive/898917

Knowledge Base

You may receive an error message when you try to connect to the Active Directory directory service forest in Microsoft Identity Integration Server 2003

Article ID: 898917

Article Last Modified on 10/27/2006

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APPLIES TO

• Microsoft Identity Integration Server 2003 Enterprise Edition

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Important This article contains information about how to modify the registry. Make sure to back up the registry before you modify it. Make sure that you know how to restore the registry if a problem occurs. For more information about how to back up, restore, and modify the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows registry

SYMPTOMS

In Microsoft Identity Integration Server 2003 (MIIS 2003), you may receive one of the following error messages when you try to connect to the Active Directory directory service forest:

Error message 1

Error 1212 "The format of the specified domain name is invalid"

Error message 2

Error 1355 "The specified domain does not exist or could not be contacted"

CAUSE

By default, a domain member cannot use the Domain Name System (DNS) networking protocol to resolve to a domain controller that is located in a different forest. A domain member cannot do this when the domain controller has a single-label DNS name.

RESOLUTION

Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall your operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.

To resolve this problem, add the following REG_DWORD registry entry, and then set the value to 1:

AllowSingleLabelDnsDomain

To do this, follow these steps:

1. Click Start, click Run, type regedit, and then click OK.
2. Locate and then click the following registry subkey:

   HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Netlogon\Parameters

3. On the Edit menu, point to New, and then click DWORD Value.
4. Type AllowSingleLabelDnsDomain, and then press ENTER.
5. Right-click AllowSingleLabelDnsDomain, and then click Modify.
6. In the Edit DWORD Value dialog box, type 1 in the Value data box, and then click OK.
7. On the File menu, click Exit.

MORE INFORMATION

For more information, click the following article number to view the article in the Microsoft Knowledge Base:

300684 Information about configuring Windows for domains with single-label DNS names

Keywords: kbactivedirectory kbtshoot kbprb KB898917

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