Earlier quoted context omitted.
They've got their own version of Windows and licensing. They're not running Windows 10 Home lol. They've got their own LTSC type thing. DoD works directly with Microsoft. None of this applies to them.
I have worked in National Defense, held a security clearance, etc. and can confidently say you are mistaken. Microsoft is not maintaining a separate build of Windows for DoD. They may have bespoke licensing agreements and support contracts, but military and DoD workstations run regular windows.
https://learn.microsoft.com/en-us/office365/servicedescripti...
>> Subscriptions in the GCC High and DoD environments include the core Exchange Online, SharePoint, and Skype for Business features. Given the increased certification and accreditation of the infrastructure, there are some feature differences between the general commercial Office 365 offerings and those available in GCC High and DoD.