After installing Windows 2012 on old Fujitsu Primergy RX200 we lost ability to manage it with serial console. We’ve even tried to update iRMC firmware with no luck. Problem was resolved after we enabled EMS (Emergency Management Services) with the following set of commands:
Read MoreBCDedit /bootems {Boot_entry_id} ON
bcdedit /ems on
bcdedit /emssettings EMSPORT:2 EMSBAUDRATE:115200