Unable to find the property in config tool to get the mail notification

Hi Experts,

We are unable to find the ume.user_logon_problem_request=true property in config tool.

We need to set value as true to get the new password to email.

Please advice to how will get that property or how will add that property in configtool as we are using portal version 7.0.

Your response will be appreciated.

Warm Regards,

Vamshi Krishna