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.

Go to https://login.microsoftonline.com/, select “Select Account” > “Forgot Password” on the “Enter Password” screen, and follow the instructions to reset your password.

Logging into the Office 365 Portal requires a new password, which is defined by the user upon signing up for EES advantages instead of the unified verification password.

Apparently, you can receive some charge-free services from Microsoft by creating a Microsoft ID using your personal email address. That is not related to this service of ours. We do not recommend using your @s, @u or @un email address to create your Microsoft ID. That could cause a problem when you receive services from the University of Tsukuba.

You need to sign up (register) using your “@u.tsukuba.ac.jp” or “@un.tsukuba.ac.jp” email address, which is provided by the University of Tsukuba. If your email address is not accepted, make sure that you have made no typos. Please note that email address ending with “@s.tsukuba.ac.jp” cannot be accepted.
We request students enroll in 2017 or later to read the following website carefully:
Microsoft Office (for private use)

Do it by

1. Sign-in yourself in https://myaccount.microsoft.com/
2. Click the “My sign-ins” in the left-edge menu
3. Your recent active sign-in history is displayed

For detail, also refers to Microsoft’s newest document. (eg. search keywords “Microsoft365 recent activity” and read the Microsoft Support in that page.)
If you also want to change your password, please read this QA, ignoring the URL told in that document.

Do it by

1. Sign-in yourself in https://myaccount.microsoft.com/
2. Click the “Password” in the left-edge menu .
   (If you have set to received confirmation code in SMS or e-mail, do as instructed)
3. Change your password as instructed.

This is a problem with self-signup for people using @un email addresses.
If you do not receive a code to sign in with your @u email address, please see below.
I did not receive a code when signing in to Microsoft 365

Please check the following：

• If you set up mail forwarding, check the destination mailbox and the forwarding settings are correct.
• Check your spam folder.
• If you are using Outlook, check the “Other” tab next to the “Focused” tab.

If you do not receive the code after checking these factors, there may have been a problem in Microsoft system when you signed up. Please sign up again the next day.
Please note that if you repeatedly click the resend confirmation code button, the system may lock for 24 hours. If so, please leave it for more than a day and try to sign up again.