I purchased Office for Mac 2011 from Best Buy about 18 months ago.
I installed and used it, except I chose to NOT use the Outlook, opting to use Mac's iMail instead.

I've now decided to move to Outlook, and cannot get it to work.
I typed in the product key from the original package, which worked fine when I first used it. 
 But now I get this error message: 

The product key is not valid. Make sure that you entered the correct key.  If the key doesn't work, contact Microsoft Customer Service and Support.



How can I fix this?

Thanks,

Jason Beighley

For some time now, I never receive emails from Amazon when I purchase items, I used to all the time. Also I do not get emails from my son and my car club and they are in my safe senders list. Also this past weekend Best Buy was to email a receipt to me and Home Depot was to mail a contract to me. In both cases I did not receive them after numerous attempts and had to use an alternate email address to get them. This is very annoying and I am at wits end. I have no blocked users, no rules, no forwarding. PLease help