You need to follow the given steps in the process of scheduling the Microsoft AZ -900 Exam.
- Go to the Microsoft portal and register your exam
- When you are done with preparation go ahead and schedule your exam by clicking on the “schedule exam” link
- Fill all your details on the next page
- You can select the exam delivery option on the page of Pearson VUE, Microsoft’s exam partner.
- Your registration will complete once there’s a confirmation on the payment of your exam fee.
For more detail visit the Microsoft AZ 900 exam site.