There are tutorials for that all over the web and since it's Windows it's best not addressed here. So make sure you have a good backup, good Windows installation media, and your Windows disk recovery key before you start. If you don't have your Windows bitlocker key ready, you will have lost that particular Windows installation - possibly a nasty surprise. It's worth noting (as someone who dual boots Windows and Ubuntu) that you will need to make sure secure boot is disabled in the BIOS, and as you toggle that you will trigger Windows bitlocker disk recovery the next time you boot Windows. I suspect the main difficulty you will encounter is just that Ubuntu server appears to use a console-driven install (not a GUI), so the installation process might be targeted towards the advanced user. As of January 2010, nearly 100 of these add-ins have been developed for WHS, including applications for antivirus & security, backups, disk management, automation, media, network/power management, remote access, BitTorrent and more.

What's the difference between desktop and server? | Community Help Wiki Windows Home Server allows for developers to publish community and commercial add-ins designed to enhance the Windows Home Server with added functionality. Yes, the differences between ubuntu server and desktop don't have anything to do with the boot manager (grub), and as long as the boot manager can handle a dual-boot aware install and boot process, it will work fine.