Change your Microsoft 365 for business password to keep your account secure.
Sign in to office.com/signin with your work or school account.
Go to Settings > Password.
Enter your old password.
Create a new password and confirm it.
Select Submit to finish and change your password.
Important: Your organization determines character requirements and how frequently you need to change your password. If you do not see the option to change your password, your organization is blocking you from changing it. Contact your admin for more information.
Sign in to Office or Microsoft 365
I forgot the username or password for the account I use with Office