Are you referring to these properties on the [SOAP object][1]


  [1]: https://developer.salesforce.com/docs/atlas.en-us.mc-apis.meta/mc-apis/triggeredsenddefinition.htm

>AutoAddSubscribers xsd:boolean Indicates whether a triggered send recipient is added to a subscriber list. If set to True, the call automatically adds the email address associated with the triggered send to a specified subscriber list.
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>AutoUpdateSubscribers  xsd:boolean Indicates if any subscriber information is updated as part of a triggered send. If set to True, the triggered send call updates any applicable subscriber information with information from the send.