Event ID - 1131

Event Id1131
DescriptionAn interoperability error occurred with entity <object name>. A reliable transport service element (RTSE) error occurred. There is an incorrect internal connector handle (LPI) on the message. The incorrect LPI is <value>-<value>-<value>. Control block index <index name>. [<value> <value> <value> <value>] (14)
Event InformationAccording To Microsoft:

The diagnostics logging levels of the message transfer agent (MTA) Interface and Interoperability categories should be increased to create interoperability logs.These logs are text logs that consist of the binary contents of communication among MTAs in different sites and between MTA and client applications within a site. They are stored in the \Exchsrvr\Mtadata directory. The current log is always named Bf0.log. Prior logs are named Bfx.log, where x increases as the age of the log increases.

To help Microsoft Product Support Services track down the problem, create log files. See Knowledge Base articles Q163032 and Q168906 for more information. To create Ap*.log files, in the Diagnostics Logging tab of the Server Properties dialog box, select MSExchangeMTA and set the logging level of the Interoperability and Interface categories to Maximum. To create Bf*.log files, set the logging level of the APDU and X.400 Service categories to Maximum.Save all MTA log files (mtadata\*.log), Event Viewer output, and database files.
Reference LinksMicrosoft product: Exchange Version: 6.0 Event Source: MSExchangeMTA Event ID: 1131

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