You can disable an account by using the disable utilities supported by the resource or the account disable utility provided by Identity Manager.
Use native disable utilities whenever possible.
Native support for disabling an account: Certain resources provide a separate flag that, when set, prevents users from logging in. Example utilities include User Manager for Active Directory Users and Computers for Active Directory, and ConsoleOne or Netware Administrator for NDS/Netware. When an account is enabled, the user’s original password is still valid. You can determine whether native support for account disable is available on your resource by implementing the supportsAccountDisable method.
Identity Manager disable utility: If the resource does not support disabling an account, or supports disable by means of resetting the user’s password, the Identity Manager provisioning engine disables the account. You can perform the disable by setting the user account to a randomly generated, non-displayed, non-retained password. When the account is enabled, the system randomly generates a new password, which is displayed in the Identity Manager Administrative interface or emailed to the user.