If you haven't yet enabled Microsoft Update and are not receiving updates through your IT department, you should enable Microsoft Update to receive the latest Office updates and keep your version of Office secure.
If you are using Automatic Updates to automatically keep your machine up to date via Windows Update, you may not be receiving Office updates and should enable Microsoft Update immediately to receive the latest Office updates.
Note: Office 2000 is not supported by Microsoft Update, and Office 2000 users should continue to use Office Update.
Why MS do not just rollout this change as an "update" by WU
237 Microsoft Team blogs searched, 106 blogs have new articles in the pa st 7 days. 256 new articles
There is information on how to get more updates for Microsoft products on the Windows Update website and also through the Windows Vista Control Panel Windows Update. We have not rolled out this change using Automatic Updates because we do not wish to automatically modify users’ update experience.