Event ID - 1218

Event Id1218
DescriptionAn interoperability error occurred with entity <object name>. Session error: incorrect combination of concatenated session protocol data units (SPDU). Control block index <index name>. [<value> <value> <value> <value>] (14)
Event InformationThe 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. Contact Microsoft Product Support Services. You can enable text event log files (Ev*.log) by modifying the Registry.
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