Error %1 connecting to the Microsoft Active Directory.

Product: Exchange
Event ID: 1121
Source: MSExchangeIS
Version: 8.0
Symbolic Name: msgidFailedConnectDS
Message: Error %1 connecting to the Microsoft Active Directory.

This Error event indicates that an Active Directory server could not be contacted when initializing the Microsoft Exchange Information Store service. This event may occur when one or more of the following conditions are true:

  • The Authenticated Users group does not have Read permission on the Configuration container in the Active Directory.

  • The domain controller that this Exchange server is trying to connect to is not reachable because of network issues.

User Action

To resolve this error, do one or more of the following:

  • Make sure that the Authenticated Users group has Read permissions. Do the following:

    Important   If you incorrectly modify the attributes of Active Directory objects when you use Active Directory Service Interfaces (ADSI) Edit, the LDP tool, or another LDAP version 3 client, you may cause serious problems. These problems may require that you reinstall Microsoft Windows Server 2003, Exchange Server 2007, or both. Modify Active Directory object attributes at your own risk.

    1. Open ADSI Edit.

    2. Browse CN=Configuration,DC=<domain>,DC=<com> container, right-click, and then click Properties.

    3. Click the Security tab and select Authenticated Users group.

    4. Make sure that this group has Read permissions enabled.

  • To make sure that the domain controller this Exchange server is trying to connect to is reachable, follow these steps:

    • Use the Ping or PathPing command-line tools to test basic connectivity. Use Ping to isolate network hardware problems and incompatible configurations. Use PathPing to detect packet loss over multiple-hop trips. For more information about Ping and PathPing, see: Microsoft Knowledge Base article 325487, How to troubleshoot network connectivity problems.

    • Run the Dcdiag command line tool to test domain controller health. To do this, run dcdiag /s:<Domain Controller Name> at a command prompt on the Exchange Server. Use the output of Dcdiag to discover the root cause of any failures or warnings that it reports. For more information, see: Dcdiag Overview at the Microsoft Windows Server TechCenter.

  • Review other Error and Warning events in the Application log. These events may help you find the root cause of this error.

If you are not already doing so, consider running the tools that Microsoft Exchange offers to help administrators analyze and troubleshoot their Exchange environment. These tools can help you make sure that your configuration is in line with Microsoft best practices. They can also help you identify and resolve performance issues, improve mail flow, and better manage disaster recovery scenarios. Go to the Toolbox node of the Exchange Management Console to run these tools now. For more information about these tools, see Toolbox in the Exchange Server 2007 Help.


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