Is there a reason why you're migrating from CC3 to Ranger? I can imagine there's little benefit and a vanilla setup would offer more options and be considerably cheaper too.
Reimaging is permitted if the copies made from the Volume Licensing media are identical to the originally licensed product . Volume Licensing customers who have licensed Microsoft software products from an OEM, through a retail source, or under any agreement other than their Microsoft Volume Licensing agreement may use copies made from Microsoft Volume Licensing media. Customers can use these copies from Microsoft media only if they are the same product and version, contain the same components, and are in the same language.