To change the password on a Windows Server, follow these steps:

1. Log in to the server using your current password.
2. Open "Control Panel" and select the "User Accounts" category.
3. Choose "Change your Windows password."
4. Follow the on-screen instructions and enter your current password along with the new password you want to use.
5. Click "Change password" to apply the changes.

These steps will allow you to change the password on Windows Server. Make sure to always choose a secure and strong password that meets the security requirements of your system.