Unique password enforcement (also referred to as password history) helps prevent users from re-using the same password over and over again.
In this section of the documentation
- An Introduction to Unique Password Enforcement and Password History
A brief overview of password history and what it can do for you. - Password History in Your Identity Cloud Entity Types
Password history changes your Identity Cloud entity types. But what exactly does it change? - Password History and Individual User Accounts
Illustrates the difference between user accounts in an entity type where password history has been enabled, and user accounts in an entity type where password history hasn't been enabled. - Managing Password History
Explains how to enable and disable password history. Also explains the difference between a password history size of 0, and a history size of 1, and a history size of .... - How Does Password History Affect the User Experience?
Password history introduces some new rules and regulations when it comes to resetting passwords. How do these new rules and regulations affect your users? - Modifying the "Password in not Acceptable" Error Message
By default, any time a user tries to reuse a previously-used password they see the error message The password is not acceptable. Please select a different password. Here's how you can change that default error message.