The Add Existing Contact button on the contact Subgrid in the Dynamics CRM SP1 Customer form interface is missing

CRM2013 hit SP1 's classmates will find a problem, customer association contact 1:N Relationship, add contacts in the form Subgrid, can only create new and cannot add existing contacts, and this phenomenon in the previous version is not.

We open the contact via the tool ribbonworkbench, right click on the Add Existing button in the Subgrid bar, select Customise command

Find the display rules in the command and see 6 rules in a meeting.

There is a notonaccountform rule, which limits the rules not shown in the customer interface, remove the rule is OK.

The Add Existing Contact button on the contact Subgrid in the Dynamics CRM SP1 Customer form interface is missing