Changing the Windows Server 2012 Administrator password via a Remote Desktop RDP connection as actioned via the Local Users and Groups section of the Computer Management.
To access the Computer Management hover in the top right corner of the desktop to get the three icons: Search; Start and Settings; to appear at the right edge of the screen. click on the Search icon and enter Computer Management in the box.
Click on the Computer Management search result, shown at the left, below the Apps title in the image above.
In the Computer Management console expand the section Local Users and Groups in the tree menu at the left hand side. click on Users to show the available users.
Right click on the Administrator account and select Set Password from the pop-up menu.
This will open a pop-up alert message warning. Click on Proceed to access the Set Password for Administrator window
Finally enter the new password in both fields and click on OK.
