Windows Server 2016 end of life: what it means for your practice server

Microsoft stops releasing security updates for Windows Server 2016 after January 12, 2027. If the server in your back office runs it, the practice software, imaging and shared files on that machine stop getting fixes for new security problems.

What changes after January 12

Nothing you can see. The server still starts, the schedule still opens and the imaging software still saves X-rays. What stops is Microsoft’s monthly security updates, so any flaw found after that date stays open on your server.

That matters more in a dental office than in most businesses, because the server usually holds the patient database. HIPAA expects you to protect that data against threats you can reasonably anticipate, and a server with known, unpatched holes is hard to defend in a risk assessment.

How to check what your server runs

On the server, press the Windows key and R, type winver and press Enter. Windows Server 2016 shows as version 1607, build 14393.

Ask the same question about what runs on it. Practice-management software often keeps its data in Microsoft SQL Server, and SQL Server 2016 has been out of support since July 14, 2026.

Your three options

• Replace the server. New hardware on a current Windows Server version, with the practice database and imaging moved across and checked before cutover. Usually the right call when the hardware is as old as the operating system.
• Upgrade in place. A newer Windows Server version on the existing hardware. Only worth it if the hardware is recent enough for both the new version and your practice software.
• Buy time with Extended Security Updates. Microsoft has sold paid security updates for older server versions before. Check whether they cover your edition, and treat them as time to plan, not as the plan.

Check your practice software first

Before you choose, check what your practice-management and imaging vendors support. Dentrix, Eaglesoft and Open Dental each publish system requirements, and they change. A new server that your imaging bridge does not support yet is worse than the old one.

A timeline that works

• Now: confirm what the server runs and how old the hardware is.
• Within a month: check your vendors’ requirements and get a quote.
• Before the deadline: build the new server next to the old one, test a backup by restoring it, and cut over on a weekend.
• After: keep the old server powered but out of daily use for a month, so you can always look something up.

Where we come in

This is a server migration, which we do for dental practices across Maryland. The free on-site assessment tells you what you are running and what it will take.