Long-latency MAPI operations found

[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: 2006-11-22

The Microsoft® Exchange Server Analyzer Tool uses the Exchange Server User Monitor (ExMon) tool to collect data, in a five minute sample, toward determining whether user MAPI operations are taking longer than should reasonably be expected on a healthy Exchange server.

If the Exchange Server Analyzer determines that, over the timeframe data was collected, a user has had one or more MAPI operations take longer than 30 seconds, the Exchange Server Analyzer displays an error and performs additional analysis on the actions of the users who triggered the error.

MAPI operations taking longer than 30 seconds may not always be a problem. Saving large amounts of message data or file attachments could cause the MAPI operations to take longer than normal.

If the user or users are experiencing frequent delays, or delays that adversely affect their messaging experience, these MAPI operation delays should be investigated further to make sure they are not symptomatic of more serious latency issues such as resource bottlenecks or nested dependencies.

To address this error:

  • Consider using the ExMon tool to capture a larger data sample for the Exchange Server Analyzer to review. Because of the large volume of data generated by ExMon, we recommend that the data collection sample be kept to 30 minutes or less.

  • Review any related latency errors and accompanying articles describing the particular operation and the steps to resolve them. If there are no related latency errors reported by the Exchange Server Analyzer, additional analysis of the user's actions revealed no issues.