Reset a Users Password as an Admin in Office 365

As an administrator in Office 365, you can reset any users password in your organization.

Open a web browser and go to admin.microsoft.com.
Sign in with your email address and password.
Click on active users on your home screen; you can also click users on the left pane and then select active users.
Select the user whose password you need to reset and a pop up should appear on the right side of the screen.
Click Reset password.
You will have options to have the system Auto-generate a password or you can create one yourself. Choose your option to create the password.

Note: We recommend that you also check the box to make the user change their password when they first sign in. Have them log into portal.office.com to update their password.
Click Reset.
The user and password will appear on the next screen. From here you can decide if you would like to send the password to someone via email or just close and not send an email.

The users password is now reset and they will be able to login with the new credentials.