We have a custom activity called party. We have attached a party to a project (entity). In the activity, is it possible to add a multi-select/sub-grid that references another entity called contacts?
So in our project entity - the party activity could have five people (contacts) associated to the party? Is this possible? I ask, because I have tried multiple things and it hasn't worked yet! It would be a one-to-many connection between a custom activity and an entity.
  
                            
                         
                        
                        
                            
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