It appears to be possible to activate Windows Server 2019 Datacenter and maybe even earlier versions of Windows Server DataCenter as well. All without modifying your BIOS and without KMS activation by using a modified bootmgr based off of Daz Windows loader file. You will need A Dell 2.5 certificate file to install A Dell OEM SLP Key. That can be found here. modified bootmgr file. What you need to do is copy the modified bootmgr file to where your existing bootmgr file resides, however before doing that you need to rename your existing one to "bootwin" without the quotes. After that simply reboot your computer. After restarting your computer you need to install a proper certificate file (DELL-DD981F15.XRM-MS) command line should be slmgr /ilc <path to cert file> Then install the above linked key or another key if attempting to use on older version of Server DataCenter. Command line should be slmgr /ipk <OEM SLP Key>. Or you can use the GUI to insert the key that way. Windows should be activated. I do not know how long this will work or will it works on every environment, so it is merely a test. I only tried this in VMWare and on a virgin OS and setup. Also tested only on BIOS mode no UEFI. Warning: Only try this on a Windows disk that you are willing to nuke, i.e. don't care about the install.