Reset all Office 365 business passwords for everyone in your organization at the same time

These steps work for a business with tens of users. If you have hundreds or thousands of users, see the next section on resetting passwords in bulk.

1. In the Office 365 admin center, go to Users > Active users.
2. Choose the box at top to select everyone in your business. Then unselect yourself. You can't reset your own password at the same time you reset everyone else's password.
3. On the right side of page, choose Reset passwords.
4. Follow text on rest of page.