Since b2005 release, the Quick Apply field can be configured using a business rule in the Job Requisition detail screen.
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SAP SuccessFactors Recruiting Management
Step 1 Go to Admin center > Configure Business Rule
Step 2 Click on + to add a new rule
Step 3 Click Basic and select the Basic scenario
Step 4 Add Rule Name, Rule ID, Start date and description. In Base Object, select the appropriate Job Requisition template where this rule has to be applied. Click on Continue.
Step 5 Select the condition to set the Quick Apply ON (Yes) or OFF (No) and save it
Step 6 Go to Admin Center > Manage Rules in Recruiting
Step 7 Click on Job Requisition and select the job requisition template
Step 8 Assign the business rule as onChange rule (Field Change Rules) or onSave rule (Save Rules). Please note that onInit rule (Initialize Rules) is not supported in this case.
Step 9 Save it
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