Analysts Paul DeGroot at Directions on Microsoft have unearthed Office Web Apps details by combing through Microsoft’s licensing documents.
Here’s a potential scenario: “You buy Office 2010 Standard or Professional Plus, which includes rights to use paid version of OWAs. You’re on road without your PC and want to use OWA from a mobile device or other source. Will you be able to do without purchasing additional Office licenses? When asked Microsoft, they never responded, but the answer is buried inside 200-page of Jan 2010 Microsoft Product Use Rights (PUR) document.
“If your computer is licensed for Office 2010, then you can use paid OWA,” DeGroot said. “In this case you’re ’single primary user of licensed device.’ Also, anyone sitting at your licensed device can also access OWA. So it’s a hybrid of user and device licensing.” I’ve also been wondering whether Microsoft’ll offer paid OWA subscription to users who don’t want to buy corporate versions of Office 2010. What if you’re an Office 2007, Office 2003 user who wants OWA access? “There’s no option for corporate customers to purchase just the right to host OWAs internally, without buying ‘thick client’ licenses,” said Horowitz. But Office 2010 users definitely should've right to access OWAs remotely, Horowitz reiterated.” More info here.