Shut Down vMA Before you power off vMA, shut down the virtual machine. To shut down vMA from vSphere Client 1 Shut down the operating system using a Linux command such as the halt command on the vMA command line. 2 Power off the vMA virtual machine using the vSphere Client. To shut down vMA from the Web UI 3 Log in to the Web UI as vi-admin. 4 In the Information tab, click Shutdown.