Sign-in & Login Problems

How to Fix Microsoft 365 Sign-In Issues After Changing Password

Maira Mehtab Sep 28, 2026 869 views

Question details

The user is unable to sign in to their Microsoft 365 account after a recent password change or security update, specifically when dealing with accounts tied to expired student email addresses.

Product: Microsoft 365
Device & OS: not provided
Scenario: Attempting to log in to Microsoft 365 services after resetting a password or when the primary email address is an expired student account.
Observed behavior: The sign-in process fails, preventing the user from accessing their Microsoft 365 applications and subscription benefits.

Before you start

Before troubleshooting, ensure you have the exact error message displayed on your screen and verify whether your Microsoft 365 subscription was purchased directly from Microsoft or a third-party retailer.

Solution 1Recommended

Use the Original Purchase Email Address

Ensure you are using the exact email address associated with the Microsoft 365 purchase rather than an expired student or secondary email.

Often, users attempt to log in using an old school or work email address that has expired. Microsoft 365 requires the specific email address that was used to create or purchase the subscription.

Locate Purchase Confirmation

Check your personal email accounts for the original purchase confirmation email to identify the exact Microsoft account address used for the subscription.

Access the Sign-In Page

Navigate to the official Microsoft 365 sign-in portal on your web browser.

Enter the Correct Account

Enter the verified email address instead of the expired student email.

Input the New Password

Type in your newly changed password and click 'Sign in' to access your account.

Solution 2

Contact Support for Account Recovery

If your subscription is permanently tied to an expired student email address, you will need Microsoft Support to help recover or migrate the account.

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Frequently Asked Questions

Why does Microsoft 365 say my account doesn't exist?

This usually happens if you are trying to sign in with an alias that was removed, an expired student email, or if there is a typo in the email address used to purchase the subscription.

Can I still access my Microsoft 365 subscription if my student email expired?

If your student email is expired and you cannot receive verification codes to authenticate a login, you will need to contact Microsoft Support to verify your identity and update the account's primary email address.

How long does it take for a password change to sync across Microsoft 365 apps?

Usually, password changes sync immediately online, but it can take up to 24 hours for all desktop applications to recognize the new credentials. Try signing out completely and signing back in if the desktop app rejects the new password.

Login & Account Issues