An interoperability error occurred with entity. The wrong functional units have been requested. Unable to accept a downgrade on the session protocol data unit (SPDU).

An_interoperability_error_occurred_with_entity__The_wrong_functional_units_have_been_requested__Unable_to_accept_a_downgrade_on_the_session_protocol_data_unit__SPDU_ (Rule)

Knowledge Base article:

Summary

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.

Resolutions

To help Microsoft Product Support Services track down the problem, create log files. See Microsoft 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. Contact Microsoft Product Support Services for assistance.

External

For more information about MSExchangeMTA event 1229, see:

Element properties:

Target

Microsoft.Exchange.Routing.MTA

Category

EventCollection

Enabled

True

Event_ID

1229

Event Source

MSExchangeMTA

Alert Generate

True

Alert Severity

Warning

Alert Priority

Normal

Remotable

True

Alert Message

An interoperability error occurred with entity. The wrong functional units have been requested. Unable to accept a downgrade on the session protocol data unit (SPDU).

{0}

Event Log

Application

Member Modules:

ID	Module Type	TypeId	RunAs
EventDS	DataSource	Microsoft.Windows.EventProvider	Default
GenerateAlert	WriteAction	System.Health.GenerateAlert	Default

Source Code:

<Rule ID="An_interoperability_error_occurred_with_entity__The_wrong_functional_units_have_been_requested__Unable_to_accept_a_downgrade_on_the_session_protocol_data_unit__SPDU_" Enabled="onEssentialMonitoring" Target="Exch2003Core!Microsoft.Exchange.Routing.MTA" ConfirmDelivery="false" Remotable="true" Priority="Normal" DiscardLevel="100">

  <Category>EventCollection</Category>

  <DataSources>

    <DataSource ID="EventDS" TypeID="Windows!Microsoft.Windows.EventProvider">

      <ComputerName>$Target/Host/Host/Property[Type="Windows!Microsoft.Windows.Computer"]/NetworkName$</ComputerName>

      <LogName>Application</LogName>

      <Expression>

        <And>

          <Expression>

            <SimpleExpression>

              <ValueExpression>

                <XPathQuery>Channel</XPathQuery>

              </ValueExpression>

              <Operator>Equal</Operator>

              <ValueExpression>

                <Value>Application</Value>

              </ValueExpression>

            </SimpleExpression>

          </Expression>

          <Expression>

            <SimpleExpression>

              <ValueExpression>

                <XPathQuery>PublisherName</XPathQuery>

              </ValueExpression>

              <Operator>Equal</Operator>

              <ValueExpression>

                <Value>MSExchangeMTA</Value>

              </ValueExpression>

            </SimpleExpression>

          </Expression>

          <Expression>

            <SimpleExpression>

              <ValueExpression>

                <XPathQuery>EventDisplayNumber</XPathQuery>

              </ValueExpression>

              <Operator>Equal</Operator>

              <ValueExpression>

                <Value>1229</Value>

              </ValueExpression>

            </SimpleExpression>

          </Expression>

        </And>

      </Expression>

    </DataSource>

  </DataSources>

  <WriteActions>

    <WriteAction ID="GenerateAlert" TypeID="SystemHealth!System.Health.GenerateAlert">

      <Priority>1</Priority>

      <Severity>1</Severity>

      <AlertOwner>$Data/PublisherName$</AlertOwner>

      <AlertMessageId>$MPElement[Name="An_interoperability_error_occurred_with_entity__The_wrong_functional_units_have_been_requested__Unable_to_accept_a_downgrade_on_the_session_protocol_data_unit__SPDU_.AlertMessage"]$</AlertMessageId>

      <AlertParameters>

        <AlertParameter1>$Data/EventDescription$</AlertParameter1>

      </AlertParameters>

      <Suppression>

        <SuppressionValue/>

      </Suppression>

    </WriteAction>

  </WriteActions>

</Rule>