I need a 25 character product key for my microsoft licence

You may be able to find the product key for a full version in more than one location, depending on how it was obtained (CD/DVD, downloaded, subscription, or preinstalled by the computer manufacturer, system builder, or reseller). To find the product key for a full version, check the following locations:

• Sticker on the CD case or other packaging.
• Certificate of Authenticity.
• Confirmation e-mail message that was received from an online purchase.
• Sticker on the computer.
• Documentation or user manual included with your computer.

If you cannot find your product key, you can obtain a new one. To obtain a new product key, contact Support. Find the Support telephone number for your area by running the Product Activation Wizard on your computer.
2007 Microsoft Office loadTOCNode(3, 'moreinformation');

1. Click Start.
2. Point to All Programs.
3. Point to Microsoft Office.
4. Click any Office program.
5. As soon as the Office program starts, click the Office button.
6. Click program_name Options. (For example, click Word Options or Excel Options.)
7. Click Resources.
8. On the activate Microsoft Office line, click Activate.

Microsoft Office 2003 or earlier versions of Microsoft Office programs loadTOCNode(3, 'moreinformation');

1. Click Start.
2. Point to All Programs.
3. Point to Microsoft Office.
4. Click any Office program.
5. As soon as the Office program starts, the Office Activation Wizard will be displayed.

For more information about how to activate an office product, click the following article