Microsoft KB Archive/249898

= XADM: MTA Queue Full and Process Utilization Maximized When Directory Replication Set to 'Always' =

Article ID: 249898

Article Last Modified on 10/27/2006

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APPLIES TO


 * Microsoft Exchange Server 5.5 Standard Edition

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This article was previously published under Q249898



SYMPTOMS
When you connect multiple sites with site connectors and then schedule directory replication to occur 'Always', you may find that messages fill the message transfer agent (MTA) queue.

In addition, the process utilization on the connected Exchange Server computers may reach close to 100 percent, but you receive no error messages and Event Viewer shows no relevant events.



CAUSE
This behavior can occur when the Exchange Server computers already regularly receive heavy message loads, and constant directory replication then increases the stress on the connectors and servers.



RESOLUTION
To resolve this behavior, set a staggered replication schedule for the connectors on each Exchange Server computer where the queue is full:


 * 1) In the Administrator program, open the Directory Replication object, and then click the Schedule tab.
 * 2) Click Never to set the replication schedule for the connectors, and then click OK.
 * 3) Restart the Exchange Server computer.
 * 4) Monitor the work queue. When the queue falls to zero and process utilization drops, reschedule directory replication so it occurs at staggered times.

Keywords: kbprb KB249898

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