22 Mar 2017 — KB4016635 (OS Build 14393.970) - Microsoft Support. Microsoft Support Windows 10 and Windows Server 2016 update history
| Aspect | Verdict | |--------|---------| | Build 14393.970 (April 2017) | ✅ Historical reference only | | Using it in production (2025) | ❌ Extremely high risk | | Using it in an offline lab | ⚠️ Possible, but update immediately | | The “2021” label | Likely a repack date – check file hashes | windows server 2016 build 14393970 enus april 2017 2021
After reboot:
: Follow the prompts to select your server and check the specific feature you wish to install (e.g., .NET Framework 3.5 Containers and restart if required. Core Features of Windows Server 2016 (Build 14393) This build belongs to the Long-Term Servicing Channel (LTSC) 22 Mar 2017 — KB4016635 (OS Build 14393
No build is without drawbacks. Some administrators reported that 14393.3970 introduced a rare but persistent issue with Remote Desktop licensing after reboot. Others noted longer than usual update installation times—a common complaint with Windows Server 2016 due to its component-based servicing stack. Moreover, the build did little to simplify the complex licensing model of Windows Server 2016 (Standard vs. Datacenter, core-based licensing), which remained a separate administrative headache. Some administrators reported that 14393