Overview
Allowing password reuse means a compromised password could be reused again in the future, undermining password change policies. Disabling reuse ensures users always set a new, unique password when updating their credentials.
Prerequisites
Super Admin access to the Google Admin console
Instructions
Sign in to the Google Admin console
Navigate to Security > Authentication > Password management
Select the organizational unit you want to apply this setting to
Scroll to the Reuse section
Uncheck Allow password reuse
Click Save
Note: Password management policies don't apply when users authenticate through a third-party identity provider (IdP). If your organization uses SSO, confirm that password reuse restrictions are also enforced at the IdP level.