You use TechNet/MSDN? Did you activate Office 2010 before May 1st? You need a new key...

I had to stop by and let any of my readers who are using TechNet or MSDN product keys for Office 2010 know: I just received an email from Microsoft (apologizing for the inconvenience of course) saying that if you got your product key for Office 2010 earlier than May 1st, 2010, you need to get another one.

It appears that if you activated Office 2010 with a PID key pre-dating May 1st, "certain product features may not be enabled."

For a list of the features that won't work with the pre-May 2010 key, see KB article:
http://support.microsoft.com/kb/983473

So if you've got Office 2010 installed and activated using your MSDN or TechNet key, and you simply can't get features to work-- get a new key from your subscription, and try again.

Edited to add: BTW, to change the product key of an Office 2010 product, go to Programs and Features in the Control Panel. Select the Office 2010 product you have installed, and click Change. This should trigger an Office 2010 installer screen. One of the options listed is to Enter a product key. This will give you the opportunity to enter your new product key. Good luck.

I tell ya, if ain't one thing, it's another.