I signed in with an email address ending with @ u.tsukuba.ac.jp, but I can not use Office. What should I do?

EES

Information signed in with other previous accounts such as @s.tsukuba.ac.jp account may be saved in the browser cache and cookies. Because of this, even if you intended to be signed in at @u.tsukuba.ac.jp, you may be signed in at @s.tsukuba.ac.jp.
Please delete your browser cache and cookies, or check if you can use self-signup with other browsers such as “Microsoft Edge”, “Google Chrome”, “Firefox”, or use different devices.

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