From Cayo Software:
Cayo Suspend(tm) for Active Directory empowers administrators to efficiently and accurately suspend user or groups preventing costly security and compliance violations. The tool is simple to deploy and easy to use and requires no heavy service or infrastructure.
In minutes, the easily configure policies begin to enforce consistent and effective control that meet your IT or Compliance requirements for revoking access. With Cayo Suspend your administrators will no longer struggle to perform dozens of potentially error prone steps and you won't have to maintain risky or awkward scripts.
Deleting users and groups is unacceptable because they are unavailable when needed for audit or security reasons. Disabling a user account is risky if additional steps are not taken to ensure the account won't be re-enabled with unintended consequences. Disabling a group isn't provided by Active Directory.
Better than Delete & Disable: Cayo Suspend delivers something better than Delete or Disable; it puts a "Suspend" command at your fingertips. Suspend invokes Policy Workflow steps that prevent user accounts from authenticating and group from being used for security or distribution list operations. With right-click undo, reactivating the user or group is just a mouse click away.