DSAccess reports that this Active Directory server is taking longer than 2 seconds to respond to LDAP requests

[This topic is intended to address a specific issue called out by the Exchange Server Analyzer Tool. You should apply it only to systems that have had the Exchange Server Analyzer Tool run against them and are experiencing that specific issue. The Exchange Server Analyzer Tool, available as a free download, remotely collects configuration data from each server in the topology and automatically analyzes the data. The resulting report details important configuration issues, potential problems, and nondefault product settings. By following these recommendations, you can achieve better performance, scalability, reliability, and uptime. For more information about the tool or to download the latest versions, see "Microsoft Exchange Analyzers" at http://go.microsoft.com/fwlink/?linkid=34707.]  

Topic Last Modified: 2005-11-18

The Microsoft® Exchange Server Analyzer Tool queries the Exchange_DSAccessDC Microsoft Windows® Management Instrumentation (WMI) class in the ROOT\MicrosoftExchangeV2 namespace to determine the values for the IsFast key and the IsUp key. If the value for the IsUp key is True, it indicates the directory server used by the Directory Service Access (DSAccess) component in Exchange Server is connected to the network and responding. A value of False indicates the directory server is not responding. If the value of IsFast is True, it indicates the response time of this directory server is less than two seconds. A value of False indicates the response time is more than two seconds. If the value of IsUp is True but the value of IsFast is False, an error is displayed.

  1. Examine the load on the domain controller and global catalog. An overloaded domain controller and global catalog can be slow to respond to Lightweight Directory Access Protocol (LDAP) calls.

  2. Make sure that there is at least one global catalog in the local Active Directory® directory service site for optimal performance.

For more information about DSAccess and directory services detection, see the Microsoft Knowledge Base article 250570, "Directory Service Server Detection and DSAccess Usage" (http://go.microsoft.com/fwlink/?linkid=3052&kbid=250570).