Hi @CAdams21,
If you want to reference event properties, you would have to click “Edit available data” below – and include activities as a data source.
There you could select the activity date of the last activity updated. The risk here is that this could be something else than the meeting – this ambiguity can currently not be ruled out.
Alternatively, simply enroll records based on ‘When filter criteria is met’, then filter on associated activities where the meeting type corresponds to your desired meeting type and where activity date is more than 0 days ago. The date won’t populate until the meeting date has moved a few seconds into the past.
Best regards!