Microsoft has kicked off licensing add-ons that let enterprises add Office 365 subscriptions atop existing volume license agreements, touting the new options as a more flexible, simpler way for businesses to move to a rent-not-buy model. Flexible: Maybe. Simpler? Hardly. Independent analysts scoffed at any notion of Microsoft's licensing becoming easier to understand, with one saying that the Redmond, Wash. company's practices have become so Byzantine it's "getting ridiculous."