I can't log in to Office365/Microsoft Account

An application from AMI is required to use Office365 services.
Now, you don't need to apply.

You have to log in Microsoft Account to use Office365, Microsoft Stream, Teams etc. When you log in, note the points below.   
The logon user name is

account name@sic.shibaura-it.ac.jp

You can NOT log on with
 account name@shibaura-it.ac.jp

For details, please refer the Installation guide.