What is Licensing?
	Licensing Options
	Licensing Documentation
	CAL Guide

Proper Documentation
Every unit of software comes with its own type of media and/or documentation that serves as its proof of license. Below you’ll find the specific requirements based on the type of license you’ve chosen.

Pre-installed (OEM) Software
In order to establish and prove license ownership you should retain:

The End User License Agreement (EULA)—this is the agreement between the PC manufacturer and the purchaser. The Certificate of Authenticity (COA) Original media and manuals (if applicable) Your purchase invoice and/or receipt

Full Packaged Product (FPP or Retail)
For each unit of retail product you purchase you should keep:

The End User License Agreement (EULA)—this is the agreement between the purchaser and the software manufacturer. The Certificate of Authenticity (COA) Original media and manuals (if applicable) Your purchase invoice and/or receipt

Open License
In this instance, your proof of license is posted on the secure eOpen site. To verify the number of licenses purchased simply log on to the site using your Microsoft Passport ID and enter your unique Open License Authorization number(s).

Learn more about eOpen

Select License and Enterprise Agreement License
Microsoft Volume Licensing Services offers secure, online, personalized access to details pertaining to your Select License and Enterprise Agreement License. This includes order confirmations which serve as a portion of your proof of license. Once your agreement is in place you can track your license purchase information and agreement status at http://licensing.microsoft.com.

Learn more about Microsoft Volume Licensing Services