The above link has the property.
The documentation says the following
Two possible sources of input data for the Team Center Map exist:
- Transaction Trace data(Default)
- Application Triage Map data
Transaction Trace data is the default source of data for the Team Center Map. You cannot use both data sources simultaneously.
By default, transaction trace data is used as the source data for Team Center Map. When set to true, legacy appmap data sent by the agents will be used
# When set to false(default), appmap data derived from transaction traces will be used
introscope.apm.appmap.legacy.data.source = false
So, disabling the above property enables the EM TT plugin.
And conversely, enabling this property disables the EM TT Plugin.