Once you configure a policy, the next step would be to secure the user accounts of that policy by enforcing the security features available under the Advanced tab(available to you on successfully completing the Policy Configuration process)
Under the Advance tab, you are provided with the following options using which you can enhance the security of the end-user account.
Reset & Unlock
Question & Answer Settings
Click on Advanced Policy Configuration Options for further details.
For more details on Security Options in ADSelfService Plus - Check the Security Center.