Microsoft 365
How to change your Microsoft 365 password
Change your work account password or reset a forgotten one, then get back into Outlook, Teams and OneDrive safely.
Microsoft 365
Last reviewed 9 November 2026
Your Microsoft 365 password gives you access to your work email and services such as Outlook, Teams, OneDrive and SharePoint. This guide covers Microsoft work or school accounts, rather than personal Outlook.com or Hotmail accounts.
Choose the right method
- Know your current password? Use Method 1 to change it.
- Forgotten your password or cannot sign in? Use Method 2 to try a self-service reset.
- Think someone else has accessed your account? Contact ARK Assist immediately, preferably by phone. Do not wait for a scheduled password change.
Method 1: Change a password you know
- 1Open your browser and visit https://myaccount.microsoft.com.
- 2Sign in with your work email address and current password. Complete any multi-factor authentication (MFA) requests you initiated.
- 3Select Change password or Password. Microsoft may ask you to verify your identity again.
- 4Enter your current password, then enter your new password and repeat it to confirm.
- 5Select Submit, or the save button shown, to finish. Your new password must meet your organisation's security requirements.
Sign in again after changing your password
You may need to sign in again using your new password in the following applications:
- Microsoft Outlook and Teams.
- Microsoft OneDrive and Office applications.
- Email applications on your mobile phone.
If your Windows computer uses your Microsoft 365 account to sign in, you may also need your new password when signing in or unlocking it. Your existing Windows Hello PIN may continue to work, depending on your organisation's configuration.
Method 2: Reset a forgotten password
- 1Open your browser and visit https://passwordreset.microsoftonline.com.
- 2Enter your work email address, complete the verification challenge if requested, and select Next.
- 3Follow Microsoft's identity verification instructions. Available methods depend on your organisation and may include Microsoft Authenticator, a registered mobile number or an alternative email address.
- 4Enter a new password that meets your organisation's requirements, confirm it and submit the request.
- 5Once Microsoft confirms the reset, sign in to your work applications with your new password.
Self-service password reset must be enabled by your organisation, and you must have suitable verification methods registered. If reset is unavailable or you no longer have access to those methods, contact ARK Assist for help.
Choose a secure password
- Use a long, unique password or passphrase.
- Avoid easily guessed information, such as names or birthdays.
- Never reuse a password from a personal account.
- Use a trusted password manager where possible.
- Follow any additional password requirements set by your organisation.
Never share your password with anyone, including IT support staff. ARK Assist will never ask you to disclose your password. Only approve MFA requests for sign-ins you started yourself.
Need further assistance?
If you cannot change your password, have lost access to your authentication methods or suspect your account has been compromised, contact ARK Assist using the support options below. For suspected compromise, phone us immediately rather than relying on an affected mailbox.
Common questions
- Why isn't my new password accepted?
- Check that it meets your organisation's password requirements. If password history restrictions apply, you may not be able to reuse a previous password.
- Why does Outlook or Teams keep asking for my password?
- Close and reopen the application, then sign in with your new password. Some applications may take a short time to recognise the change. If repeated prompts continue, contact ARK Assist.
- Why can't I reset my password myself?
- Your organisation may not have enabled self-service password reset, or your verification methods may not be registered or accessible. Contact ARK Assist so we can verify your identity and help you regain access.
- Why does my computer still accept my old password?
- An offline Windows device may temporarily accept cached credentials. Connect to the internet and restart or lock your computer, then try signing in again. Your Windows Hello PIN is separate and may still work. If the password does not update, contact ARK Assist; some devices need a connection to your organisation's network or VPN.
Still stuck?
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