First test the new password in a browser: if web sign-in succeeds, reauthenticate each affected app; if it fails, recover the personal account or contact the administrator for a work or school account.
1. Test the account itself
Open a private or InPrivate browser window and sign in through the Microsoft 365 website using the same email address and new password. Microsoft documents web sign-in as the direct way to access Microsoft 365 apps.[^1^](https://support.microsoft.com/accounts-billing/subscriptions/[Subscription ID] "Android")
Pay attention to whether Microsoft asks you to choose Personal account or Work or school account. Accounts can have similar-looking usernames but use separate credentials.^2^
- If web sign-in works: the account and new password are working; continue to the app steps below.
- If web sign-in fails: skip to Account recovery.
2. Reauthenticate the affected apps
Changing the password with the account provider requires Outlook to obtain updated credentials. Outlook for Windows should ask for the new password when opened.^3^
- Close Outlook and the other affected Microsoft apps.
- Reopen Outlook.
- When prompted, enter the new password and complete any verification request.
- Sign out of other affected Microsoft 365 apps and sign back in with the same account and new password.
- Send yourself a test message and confirm that Outlook can both send and receive.
Platform-specific behavior:
- Outlook for Mac: select Outlook → Settings → Accounts. For a Microsoft 365 or Exchange account using modern authentication, select Manage, remove and re-add the account, and sign in again.^4^
- Outlook mobile: the app should prompt for the latest password after a password change.^5^
Removing and re-adding an account can remove locally stored, unsynchronized data, so verify that important mail is visible in webmail before doing so.
3. If web sign-in also fails
Personal Microsoft account
Use Microsoft’s Sign-in Helper. It checks the email address or phone number, identifies account problems, and directs you to the appropriate recovery action.^6^
Also check:
- The complete address and domain, such as
.com versus .co.uk.
- Another email alias or phone number associated with the account.
- Whether you can receive the security code.
The documented recovery process verifies identity with a security code before allowing another password reset.^7^
Work or school Microsoft 365 account
Contact your organization’s IT administrator and ask them to check whether the account is locked or disabled and, if necessary, reset its password. Self-service password reset works only when the organization’s administrator has enabled it.^8^
If you are the organization’s only administrator, use the support route described on that page rather than repeatedly changing the password.
References
- [Android](https://support.microsoft.com/accounts-billing/subscriptions/[Subscription ID])
- Troubleshoot sign-in issues and account access problems
- Change or update your email password in Outlook for Windows
- Update your password in Outlook for Mac | Microsoft Support
- Updating your email account password. | Microsoft Support
- I can't sign in to my Microsoft account | Microsoft Support
- My username and password have stopped working | Microsoft Support
- Forgot password to sign in to Microsoft 365, Intune, or Azure