Do these 3 things before closing this tab:
1Fix the driver behind crashes, sound loss and screen glitches2Repair Windows errors before they cause bigger problems3Scan for outdated or missing drivers - takes under a minuteUse Outlook.com for a personal Outlook.com or Hotmail mailbox. For work or school email, sign in at Microsoft365.com or outlook.office365.com with the account provided by your organization. The right route depends on who manages the account, and you may be asked to complete an additional verification step.
Choose the right Outlook sign-in page
| Account | Where to sign in | Credentials and next step |
|---|---|---|
| Personal Outlook.com or Hotmail | Outlook.com | Enter the username and password for your personal Microsoft account. The Outlook.com password is the same as the Microsoft account password, according to Microsoft’s web sign-in guidance. |
| Work or school mailbox | Microsoft365.com or outlook.office365.com | Use the work or school account assigned by your organization. If you start at Microsoft365.com, select Outlook from the app launcher after signing in. |
Work and school accounts are managed by an organization, so they are not interchangeable with personal Microsoft accounts. If the wrong account opens, sign out and restart with the intended account, or choose the option to sign in with a different account. Microsoft documents separate portals for Microsoft 365 operated by 21Vianet and Office 365 Germany; use the portal provided by your organization if your account belongs to one of those environments.
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Sign in to Outlook on the web
- Open the sign-in page that matches your account type: Outlook.com for personal mail, or Microsoft365.com or outlook.office365.com for work or school mail.
- Enter the email address or username for that account, then enter its password when prompted.
- Complete any verification prompt configured for the account, such as an approval request or one-time code.
- If you started at Microsoft365.com, open the app launcher and select Outlook.
The available screens and verification methods can differ by account and organization policy. If a sign-in page presents an account choice, select the personal or work/school account that corresponds to the mailbox you want.
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Sign in with the Outlook mobile app
Open Outlook on your phone or tablet and add the email account you want to use, following the app’s prompts. Microsoft documents sign-in approvals and one-time passcodes in Outlook mobile, but availability depends on account type and app or platform. Use the instructions displayed for your account. If you receive an approval request you did not initiate, deny it.
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Fix common Outlook sign-in problems
Outlook opens the wrong account
Sign out, then start again and choose the intended account. If the page offers a different-account option, use it rather than assuming a personal Microsoft account and an organization account share credentials.
You forgot a personal Microsoft account password
Use Microsoft’s sign-in helper. It asks for the email address or phone number associated with the account to identify an issue or suggest next steps.
A work or school password does not work
Whether you can reset it yourself depends on your organization’s policy. Try the organization’s self-service password reset if it is enabled; otherwise contact the IT administrator. Microsoft’s Outlook mobile sign-in guidance likewise directs organization-account users to self-service reset when permitted, or to their administrator.
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You use Gmail, Yahoo, iCloud, or another non-Microsoft account in Outlook
For sign-in trouble with an account added from another provider, contact that provider. Microsoft’s mobile app troubleshooting page directs users to the email provider for non-Microsoft accounts.
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You see Microsoft Error 400
Microsoft lists repeated sign-in attempts and problems with the app, browser, device, or network as possible causes. Try these steps:
- Choose another sign-in method already configured for the account.
- Update or reinstall the app.
- Try signing in from another device.
- Switch networks.
These are Microsoft’s suggested troubleshooting options; they do not identify a single cause for every Error 400. See Microsoft’s Outlook mobile sign-in error guidance.
Protect your account when signing in
- Before entering a password for Outlook.com, check the browser address. Microsoft says it should include
login.live.com; do not enter credentials if the address looks suspicious. - Do not reply to an email asking for your password. Microsoft says it will never ask for a password by email. Read Microsoft’s account-safety guidance.
- On a shared device, use a private browsing window and sign out when finished. Microsoft’s Hotmail sign-in guidance says that, starting in February 2025, users stay signed in automatically unless they sign out or use private browsing: Hotmail sign-in guidance.
Outlook desktop app sign-in
The instructions here cover Outlook on the web and the Outlook mobile app. Sign-in steps for the desktop application are not established by the guidance cited in this article, and may vary with the app version and account configuration.
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