Sub-grid Add Action Behavior in Dynamics CRM 2015

Hello, i need to implement in "+" button sub-grid in account form a behavior that disable quick create and shows lookup whit +new.

I change the relationship to Business Required in Company Name relationships and not work. However i change to business required the parencontactid field of contact entity and not works either.

The Posts that i read about this problem not works in CRM2015 or I do anything wrong.

Anyone can help me?