Configure size of encrypted password history

Use this setting to configure how many previous encrypted passwords will be stored in Active Directory. Configuring this setting has no effect unless 1) the password has been configured to be backed up to Active Directory and 2) password encryption has been enabled. If this setting is enabled, the specified number of older passwords will be stored in Active Directory. If this setting is disabled or not configured, zero older passwords will be stored in Active Directory. This setting has a minimum allowed value of 0 passwords. This setting has a maximum allowed value of 12 passwords. See https://go.microsoft.com/fwlink/?linkid=2188435 for more information.