User Password Policies

Changing your Password restrictions or Prevent use of breachable passwords settings will not result in your existing users being forced to change their current passwords. Only new or changed passwords will have the new requirements enforced. To find these settings, type Password restrictions in the search bar at the top of every page and click on the matching result.

To require a user to change their password, you can enable the Require password change on next login setting for the user. Type Manage users in the search box at the top of every page and then click the matching result. Edit the user and click on the Authentication tab to access the  Require password change on next login setting.