[Webservice Connector] How to let Update Attribute Operation send all attributes in form to SOA

I know Update Operation only send modified attribute (and Uid) to SOA.

But what if target service require some mandatory attribute when invoke the service? Or if target service require fully account profile when do the update operation (just 1 attribute is updated but have to send fully form to replace current profile)?

Example:

My prov form have 5 attribute: uid, login, password, cocode, menu

When I do menu updated operation, OIM only send [uid] and new value of [menu] to SOA. But the target service set [uid] + [cocode] are mandatory params. If I want to update [menu], I need 3 params: uid, cocode, menu.