Behavior after password policy change

Document ID : KB000119900
Last Modified Date : 05/11/2018
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What happens when other users log in after the administrator changes the password policy in API Portal? . 
Is the existing password affected by the password policy? 
In other words, will users who do not satisfy the password policy requirements be prompted to change their password?
API Portal 3.5 
The password policy is a limitation when creating a new account from Signup.

"General Policies" does not affect the password of existing users.
After changing the password policy, when creating a new account from Signup, the new policy will be effective.

But,"Password Expiration Rules" affect existing users
For example: If "Password expiry age" is set, if the existing user has exceeded the deadline, a password change dialog will be displayed at the next login.