Topic Last Modified: 2006-05-17

The Microsoft® Exchange Server Analyzer Tool queries the ExchangeLink Windows® Management Instrumentation (WMI) class to determine the value of the StateRetry key for the Simple Mail Transfer Protocol (SMTP) Messages waiting to be routed queue.

If the Exchange Server Analyzer finds that the value of the StateRetry key for the Messages awaiting directory lookup queue on an Exchange server is set to True, the Exchange Server Analyzer displays an error.

If a queue is in retry status, this status indicates that at least one error occurred in the previous attempts to process the messages in the queue. You can change queues in the Retry or Scheduled state to Active with the Force Connection command. This causes the queue to function as if the retry interval had passed or the scheduled time was reached. However, this method may not always work.

The properties of a queue can indicate a specific reason for a queue to be in Retry.

The Messages waiting to be routed queue holds messages until their next-destination server is determined and then moves them to their respective link queues.

Messages accumulate in this queue if Exchange Server routing problems exist. Message routing may be backed up.

To resolve this error, increase diagnostic logging for the MSExchangeTransport service to collect information about Categorizer components. Disable any unnecessary connector restrictions because the restrictions can cause a significant degradation in server performance. You may have to turn on the CheckConnectorRestrictions registry key for some restrictions.

For more information about how to modify logging settings, see "How to Modify Logging Settings for MSExchangeTransport" in the "Troubleshooting Mail Flow and SMTP" section of the Exchange Server Transport and Routing Guide (

For more information about how to troubleshoot SMTP queues, see the following Exchange resources: