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Active Directory Connector server may be overloaded

[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: 2005-11-17

The Microsoft® Exchange Server Analyzer Tool queries the Active Directory® directory service to determine the value for the msExchChildSyncAgreements attribute, which represents the connection agreements that are running on an Active Directory Connector (ADC) server. This attribute is a multi-valued string and is set on the following Active Directory object: CN=Active Directory Connector (ServerName),CN=Exchange Settings,CN=ServerName,CN=Servers,CN=SiteName,CN=Sites,CN=Configuration,DC=Domain,DC=com

The Exchange Server Analyzer retrieves the number of entries (count) in this attribute. If the count is more than 80, a warning is displayed.

It is recommended to run with fewer than 80 connection agreements per ADC server. If there are additional ADC servers that are not hosting the maximum recommended number of connection agreements, move some of the connection agreements from this server to the other ADC server. If you do not have other ADC servers, install the ADC program that is included with Microsoft Exchange 2000 Server or Exchange Server 2003 on another computer running Microsoft Windows® 2000 Server or Windows Server™ 2003.

Note that when you move a connection agreement from one ADC server to another, the core attributes of the particular connection agreement do not change. For example, the source and destination containers used for replication, as well as the data that has been configured to replicate, remain unchanged. When you move a connection agreement, only the ADC server that ran the connection agreement changes.

  1. Click Start, click Programs, point to Administrative Tools, and then click Active Directory Connector Management to open the ADC Management console.

  2. The left pane of the MMC console shows a list of servers that run the ADC service. Select the ADC for the server where the connection agreement you want to move is located.

  3. The details pane of the MMC console shows the connection agreements that are hosted on the ADC server that you selected.

  4. Right-click the connection agreement you want to move and then click Properties.

  5. On the General tab, in the Select a server to run the Connection Agreement drop-down list, select the server on which you want this connection agreement to run, and then click OK.

  6. Under Connect as (Windows Server), enter the ADC service account name and password, and then click OK.

  7. Under Connect as (Exchange Server), enter the Exchange service account and password, and then click OK.

For more information about moving connection agreements, see the Microsoft Knowledge Base article, 326060 "XADM: How to Move a Connection Agreement to Another Server" (http://go.microsoft.com/fwlink/?LinkId=3052&kbid=326060).

For more information about installing the Exchange 2000 Server ADC program on another server, see the Microsoft Knowledge Base article, 312632 "How To Install and Configure the Active Directory Connector in Exchange 2000 Server" (http://go.microsoft.com/fwlink/?LinkId=3052&kbid=312632).

For more information about installing the Exchange Server 2003 ADC program on another server, see the Exchange Server 2003 Deployment Guide (http://go.microsoft.com/fwlink/?LinkId=47569).

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