EMS Console
Use this option to configure the ACPI serial port settings for redirecting the Windows Server Emergency Management (EMS) console.
When setting this option for redirecting EMS through a network connection, do the following:
If you are using iLO 4, select the value (COM1 or COM2) that corresponds to the resources assigned to the Virtual Serial Port in the menu.
EMS Console in Windows Server 2008 and 2012
EMS provides input and output support for all Microsoft Windows kernel components, including the loader, setup, recovery console, OS kernel, blue screens, and the Special Administration Console. The Special Administration Console is a text mode management console that is available after Windows Server 2008 or 2012 OS is initialized.
Microsoft enables EMS in the OS, and you must also enable EMS in the ROM. When enabled, EMS assumes the serial port for redirection and can cause interference with other devices attached to the serial port. To avoid interference, EMS is disabled in the system ROM by default on ProLiant ML and DL servers. If EMS is disabled in Windows Server 2008 or 2012,
configure the EMS console on a COM port, and reboot the server to update the
boot.ini file.