Do you use Outlook or Skype on your phone? At Microsoft, we have over 100,000 employees that beta test these apps internally. How do we get the apps to that many users seconds after a change is made in the codebase? How do we target all the testers to give us feedback on a version? Learn how we build and test our mobile apps on the cloud and analyze our apps after distributing it to beta testers and especially how we handle a scaled store outside the Play Store.