Hi,
As far as I know, since we purchased the office 2011, the provided will give us a product key by card or email. I recommend you connect the Staples customer service center to confirm where is the product key. And then, please follow this link to active Office
2011.
http://support.microsoft.com/kb/2391941/en-us
PS :
We support Office for Windows in the current forum, since this question is about Office for Mac, I suggest you post the question in Office for Mac forum:
http://answers.microsoft.com/en-us/mac/forum?sort=lastreplydate&dir=desc&tab=Threads&status=&mod=&modAge=&advFil=&postedAfter=&postedBefore=&threadType=All&tm=1410767271163
The reason why we recommend posting appropriately is you will get the most qualified pool of respondents, and other partners who read the forums regularly can either share their knowledge or learn from your interaction with us. Thank you for your understanding.
George Zhao
TechNet Community Support
It's recommended to download and install
Configuration Analyzer Tool (OffCAT), which is developed by Microsoft Support teams. Once the tool is installed, you can run it at any time to scan for hundreds of known issues in Office
programs.