Assign Space Customer Form in Property Manager

 Hi ,

Please find the Screenshots.

Navigation->Property Manager-> Assignments->Assign Space

I am trying to Assign Space to the Customers from Property Manager Responsibility.

Please Suggest ,

How to assign Space to the Customers?

And also how to assign the DFF values to that Customer in that form?

Can you pls guide me how to assign space to the Customer and also how to enable the DFF values in that FORM. 

For Employee Assign Space it is working Fine

For Customer Assign Space form it is an Non Editable.