How to set user password lifetime for expiry
The User Password Lifetime feature lets you set an expiry date for the gateway user password. The user has to set a new password to login again after its expiry. This is useful for organizations to force their employees to reset the password of their account periodically as required by various security compliances followed.
A value 0 means the password never expires. If you want to force the user to reset the password after 30 days, you should enter the value 30. As shown below you can set the "User password lifetime"