Microsoft Azure Free Exam Vouchers
Microsoft has been offering free training online for the AZ-900 exam. There have been many sessions, and as they get full, new ones are being added.
Here is the Microsoft website that lists them through August, September & October:
Generally, the Microsoft send the Vouchers in a weeks’ time. In case you do not receive the voucher you can reach out to email@example.com to get the vouchers
So, if you have been studying for AZ-103, AZ-104, AZ-300, AZ-301, AZ-303, AZ-304 or AZ-203 and have not booked it yet, perhaps this can help. You can attend two days of official Microsoft training on the basics, and then take the exam you want for free.