Microsoft is working on its own in-house design for a server chip as it jumps on the Arm CPU bandwagon. The in-house design effort could also lead to custom Arm-based silicon for its own Surface line of computers, some of which already feature Arm designs co-developed with Qualcomm.
https://www.notebookcheck.net/Microsoft-jumps-on-Arm-bandwagon-with-reports-it-is-designing-its-own-chips-for-servers-Surface.510976.0.html