A few months ago we received questions about the scheduled Mainstream Support retirement date for Office 2004 for Mac. While most customers have upgraded to Office 2008 for Mac, some have remained on Office 2004 in order to take advantage of Visual Basic for Applications (VBA), which is supported in Office 2004, but did not make it into Office 2008.
For more details, check out the blog post by Mike Tedesco.
The date has been extended to 2012 specifically to ensure continuous cross-platform compatibility for Office 2004 customers reliant on VBA until support for VBA is released in the next version of Office for Mac. This extension does not change the 5-year support policy for other Office for Mac products, including future versions. Nor does it affect any other Microsoft products, including Office on the Windows platform. With the additional support, we will continue delivering all the types of support associated with Mainstream Support, including security updates and non-security bug fixes.