| Event Id | 1211 |
| Source | MSExchangeMTA |
| Description | An interoperability error occurred with entity <object name>. Session error: session protocol data unit (SPDU) decode failure. Server error code <error code> was detected at offset <value>. Control block index <index name>. [<value> <value> <value> <value>] (14) |
| Event Information | According To Microsoft: Cause: 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. Resolution: To create an interoperability log, in the Server Properties dialog box, on the Diagnostics Logging tab, select MSExchangeMTA, and then set the logging level of the Interoperability and Interface categories to Maximum. |
| Reference Links | Microsoft product: Exchange Version: 6.0 Event Source: MSExchangeMTA Event ID: 1211 |
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