First, you start by applying online, then a test online. After that if you are success, there is an online video interview, 8 questions. Then you have in some countries a Skype-interview, again you have to answer 6 questions. One of the most important for them is why do you want to join Microsoft?
Besides, you have an asessment centre with group activities, presentation, individual case and 1:1 interviews. Very important show as you are, they will know at the first moment.