What happened to Microsoft MVA?
It appears that the Microsoft Virtual Academy platform which hosted those courses have retired on June 10, 2019. After its retirement the option to access your Microsoft Virtual Academy certificate or the courses offered directly to that Site is no longer available.
What is MVA Microsoft?
The Microsoft Virtual Academy (MVA) is a free online school with courses that cover Microsoft-related topics and specific Microsoft products. The MVA offers a mix of on-demand courses and live events; each course contains a video and PDF download of the video transcript.
What replaced Microsoft Virtual Academy?