1. Press 'Ctrl + Alt + Delete' and then choose 'Change a password'
2. Type in your current password, and then type in the new password twice.
3. Press 'Enter' Your password will be changed to the new one.
If you use RDP connect to a remote computer, and you want to change the password of it, you can just use 'Ctrl + Alt + End' and follow the same process above.
If you forgot your domain password, please contact F1 support to reset password for you.