: In July 2022, the DON CTO echoed the mandate, requiring a full "sunset" of Windows 10 by the 2025 deadline.
The DoD runs thousands of legacy applications, many built on .NET Framework 3.5 or older C++ runtimes that were not initially tested on Windows 11. On June 8, 2022, the DoD released a "Migration Impact Matrix" identifying four red-zone applications:
The DoD CIO memo (dated June 8) ties the migration timeline to (Software Supply Chain Security). dod migration to microsoft windows 11 june 8 2022
Windows 11 relies heavily on cloud-based reputation checks for its SmartScreen filter. For disconnected DoD assets, DISA had to develop an "On-Premises Reputation Server"—essentially a local cache of safe/unsafe file hashes that updates via sneakernet or secure satellite burst transmissions. This solution added six months to the migration timeline for Navy fleet systems.
Microsoft will play a critical role in supporting the DoD's migration to Windows 11. The company will provide: : In July 2022, the DON CTO echoed
– In a move that sent ripples through both the defense contracting sector and the broader IT industry, the United States Department of Defense (DoD) officially solidified its timeline for one of the largest enterprise operating system migrations in history. On this date, internal memoranda and public statements from the Defense Information Systems Agency (DISA) converged to confirm what many had anticipated: The DoD is moving to Microsoft Windows 11.
On June 8, 2022, the Department of Defense (DoD) Chief Information Officer (CIO) released a memorandum mandating a department-wide migration to . This directive established a hard deadline for all service components to sunset Windows 10 by October 14, 2025 . Key Directives of the June 8, 2022 Memo Windows 11 relies heavily on cloud-based reputation checks
: A major hurdle identified early on was the strict hardware requirements for Windows 11, specifically the need for Trusted Platform Module (TPM) 2.0 and compatible processors.