Activate Office 2010 Professional Plus online
Click File > Help > Activate Product Key. If you don't see an Activate Product Key button, your software is already activated, and you don't need to do anything.
Follow the steps in the Activation Wizard. If you're activating over the Internet and have a slow connection, you might want to activate by phone.
Activate Office 2010 Professional Plus by phone
In the Activation Wizard, choose I want to activate the software by telephone.
Call the numbers for your specific country/region listed in this article. Microsoft Text Telephone (TT/TTY) services are available for individuals who are deaf or hard of hearing. In the United States, using a TT/TTY modem, dial (800) 718-1599. From outside the United States, using a TT/TTY modem, dial (716) 871-6859. TT/TTY service is only available in English.
When you call the Activation Center, you'll be asked to provide the installation ID (displayed on your screen) and other relevant information. After your installation ID is verified, you'll receive a confirmation ID.
In the Activation Wizard, type the confirmation ID in the spaces provided at the bottom of the screen, and then press the Enter key.
If you still can't activate Office, call the activation number, but don't enter anything or say anything. You'll be transferred to someone who can help you.
What happens if you don't activate Office 2010 Professional Plus? If you don't activate your software, eventually Office 2010 switches to Reduced Functionality mode where it lets you open files to view them but not edit them. You can still activate by going to File > Help > Activate Product Key.
To learn more about what the license terms allow, read the Microsoft Software License Terms for your Office product.
Sources:
: Activate Office 2010 - Microsoft Support
: Microsoft Software License Terms (MSLT) for Microsoft Office 2010
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