There are two ways changing your password remotely. Either via office.com, or thru the Microsoft Authenticator application on your phone.
office.com:
1. Go to office.com
2. Click on the gear in the upper-right of the screen.
3. Select "Change your password -->
4. Once a new password is entered, click "Submit."
Microsoft Authenticator application:
1. Go to Microsoft Authenticator on your phone.
2. Tap on your Medical Teams International account.
3. Tap on "Change password."
4. When prompted, sign in with your Medical Teams International account.
5. Enter your current password.
6. Create a new password.
7. Confirm your new password, and tap "Submit."