This is a one-way connection agreement from Windows

[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]  

Topic Last Modified: 2005-11-17

The Microsoft® Exchange Server Analyzer Tool queries the Active Directory® directory service to determine the value of the msExchSynchronizationDirection attribute on each connection agreement object. The msExchSynchronizationDirection attribute represents the direction in which the directories will be synchronized. If this attribute is set to 1, a warning is displayed.

The msExchSynchronizationDirection attribute can have a value of 0, 1, or 2. A value of 0 indicates a two-way connection agreement, a value of 1 indicates a one-way connection from Active Directory, and a value of 2 indicates a one-way connection agreement from the Exchange Server computer.

It is recommended as a best practice to use two-way connection agreements. Mixed-mode Exchange environments (those where Exchange Server 5.5 coexists with Exchange 2000 Server and/or Exchange Server 2003) require a two-way connection agreement.

To correct this warning

  1. Remove the existing one-way connection agreement.

  2. Create a replacement two-way connection agreement.

For more information about Active Directory Connector (ADC) connection agreements, see the following Microsoft Knowledge Base articles: