Download & run — if Windows shows a security
warning, click More info → Run anyway. This
appears for new apps that aren't yet code-signed. After this
first install, MBMS checks for updates on launch and offers to
install them automatically — no need to come back here for
future releases.
2
Sign in your way — Microsoft, Google, or an
emailed code. Use the email address your administrator invited
you with; your organisation must be set up first.