Enforcing Password history

Enforcing password history will define how frequently the passwords can be used from the history base. These settings can be administered using the Security Enhanced Directory Manager plugin

Here are the steps

Go to System Settings>Directory Manager Settings>Configure Plugin(Security Enhanced Directory Manager)>Default Directory Password Policy

The default is set to 5 for "Number of Unique Passwords Before Re-use". A select box allows an admin to select other options or remove this setting from the system.