IT News Microsoft Office Genuine Advantage closed, quietly
Office Genuine Advantage or OGA as a technology to prevent piracy, as WGA just used for Microsoft Office that people want to download the add-on or template from Office.com through OGA before use.
But there are reports that Microsoft has closed a quietly OGA services without specifying the reason clearly and Web pages related to validate that a genuine, it is removed from the Microsoft Web site:
To disable OGA is not about activate Microsoft Office programs installed that also need to enter the same key. The WGA has not been altered.