Microsoft 365 Mail Login: How to Access Your Inbox

To open Microsoft 365 Mail, use the official Microsoft 365 portal, sign in with the email address issued by your organization, and select Outlook. A personal Microsoft account and a work or school account may look similar at sign-in, but they lead to different mailboxes.

Where do I sign in to Microsoft 365 Mail?

Open {site}, select Sign In, and enter the full email address or username connected to the mailbox. This is the safest way to reach the official Microsoft 365 Mail portal without relying on search results that may lead elsewhere.

A personal Microsoft account is used with consumer services such as Outlook.com. A work or school account is created and managed by an employer, school, or other organization. Microsoft checks the address and normally directs it to the correct sign-in system.

If Microsoft asks you to choose an account type, select Work or school account for an organization-managed mailbox. Select Personal account only when the mailbox belongs to your personal Microsoft account. Accounts can have the same visible email address but remain separate, with different passwords and security settings.

How do I complete the Microsoft 365 Mail login?

1. Open the official Microsoft 365 portal and select Sign In.
2. Enter your complete work or school email address, including the part after the at sign, and select Next.
3. If an account choice appears, choose Work or school account unless you are opening personal Outlook mail.
4. Enter the password for that account. Your Microsoft 365 password may be controlled by your employer or school.
5. Complete any identity check shown on the screen. The available method depends on the security options already registered for the account.
6. After the Microsoft 365 home page opens, select the app launcher, then select Outlook to open the inbox.

If the browser opens the wrong mailbox automatically, select the account menu, sign out, and begin again with the intended address. On a shared device, avoid allowing the browser to save the password.

Why is Microsoft 365 asking for a verification code?

Two-factor verification means the account requires a second proof of identity in addition to a password. An organization may require this check, particularly on a new or untrusted device.

• Authenticator notification: Open Microsoft Authenticator on the registered device and approve the request. The screen may ask you to enter or match a number.
• Authenticator code: Enter the temporary code currently displayed by the registered authenticator app.
• Text or email code: Microsoft sends a code to a phone number or alternate email address already stored as security information.
• Security key or device sign-in: Follow the prompt for the method previously registered with the account.

If a code never arrives, confirm that the partly hidden phone number or email address is familiar, check the junk folder, and select another available verification method. Never approve an unexpected request or share a code with someone who contacts you.

How do I reset a forgotten Microsoft 365 Mail password?

1. Start at the Microsoft sign-in screen and enter the account address.
2. Select the option labeled Forgot password or Can't access your account.
3. Confirm the work or school username and complete any requested identity check.
4. Choose an available recovery method and follow the prompts to create a new password.
5. Return to the portal and sign in with the new password.

Self-service reset must be enabled by the organization, and the account must have suitable security information registered. If the reset screen says to contact an administrator, only the employer’s or school’s IT help desk can provide the next step. Microsoft support cannot bypass an organization’s account controls.

How do I fix common Microsoft 365 Mail sign-in errors?

• The username is not recognized: Check every character and the domain after the at sign. Use the address supplied by the employer or school, not a personal Outlook address or an old organization domain.
• The wrong account or mailbox opens: Sign out of every Microsoft account in that browser, close the sign-in tab, and try again. A private browsing window can help separate a new login from an outdated session.
• The account is locked or blocked: Stop repeated attempts and follow the recovery message on the screen. For a work or school account, contact the organization’s IT administrator, who can check the account status and sign-in records.
• The page keeps returning to sign-in: Close old Microsoft tabs, allow necessary cookies, or clear Microsoft site data in the browser before trying again. Trying another supported browser can show whether saved browser data is causing the loop.
• The password works elsewhere but not here: Confirm that the browser is using the intended personal or work account. If the organization recently changed its sign-in rules, follow its IT instructions.

How do I use the Outlook mobile app for Microsoft 365 Mail?

In the Outlook mobile app, choose Add Account or Sign In and enter the same complete email address used on the web. The app may hand the sign-in process to a Microsoft or organization-branded page, where you enter the password and complete the same verification required by the account.

The mobile app keeps the account connected after successful setup, while the web portal opens the mailbox inside a browser session. Device-management or security prompts may appear for a work or school account because those requirements are set by the organization. If setup fails, remove only the affected account from Outlook and add it again; do not erase the device unless the organization’s IT staff specifically directs you to do so.

How do I get help when Microsoft 365 Mail will not open?

For a work or school mailbox, contact the employer’s or school’s IT help desk first. Administrators can confirm the exact username, reset an organization-managed password, unlock an account, review sign-in errors, and update verification methods.

For a personal Microsoft account, use Microsoft Support and choose the account sign-in or account recovery topic. Have the exact error message, account type, device, browser or app name, and the last step that worked ready. Support representatives cannot send verification codes, reveal passwords, or bypass identity checks, so use only recovery methods shown by Microsoft and never give a security code to another person.