A leaked video suggests Microsoft’s world-renowned productivity suite will soon feature cloud-like options in an effort to curb Google Apps’ growing market share with its alternate offering.

The 30-second promo above is hosted on YouTube by Within Windows. It emphasizes “Office 15″ as the suite’s newly re-branded name. It also focuses on the accessibility of the next iteration through remote access to documents, which is enabled by a normal sign-in procedure. The cloud options will tracks and store all of a user’s virtual papers in Microsoft’s cloud-based Sky Drive service.

Microsoft Office is dueling many cloud-based productivity suites, such as Google Apps, and it is steadily losing market share. The downward spiral even caused the once-great Word processing giant to embark on a smear campaign against Google, where it lambasted the Mountain View, Calif.-based Company as a shady advertiser with alternative motives.

Google Apps is a Google service that features several Web applications similar to traditional office suites. The services vary per edition but generally include Docs, Gmail, Calendar, Talk, Sites, Groups, Video, and Marketplace. The suite’s education package is rapidly increasing in popularity among students and educational institutions due to enhanced sharing features, accessibility, and cost.

Office 15 is currently only available to beta testers, but its new cloud-based features are sure to keep Google on its toes. The Verge noted Microsoft will publicly release the beta release by this summer, with a completed version out by 2013.