If your business is still running SQL Server 2016, the countdown just got a lot shorter: Microsoft’s extended support ends on 14 July 2026. That’s not a typo, and it’s not far off. After that date, no more security patches, no more bug fixes, no more official support – the database keeps running, but every new vulnerability discovered against it stays open indefinitely.

It’s not the only deadline this year

2026 is an unusually crowded year for Microsoft end-of-support dates, and a few of them stack close together:

• SQL Server 2016 – extended support ends 14 July 2026 (Extended Security Updates available for up to three more years for those who need the bridge).
• Windows Server 2012 & 2012 R2 – final year of Extended Security Updates ends 13 October 2026. If you’re still on this, it needs replacing now.
• Office LTSC 2021 & Project 2021 – also reach end of support on 13 October 2026.
• Windows Server 2016 – support runs to 12 January 2027, but with everything else landing in 2026, it’s worth pulling into the same planning cycle rather than leaving it for next year.

What “end of support” actually means

The software doesn’t stop working the day after the deadline. What stops is Microsoft shipping security patches, bug fixes, and technical support. Every vulnerability discovered from that point on is a permanent, unpatched hole unless you’re covered by an Extended Security Updates (ESU) subscription – which is a stopgap, not a long-term plan, and gets more expensive the longer you rely on it.

For regulated sectors, there’s a second problem: running unsupported software can fail compliance and insurance requirements even if nothing has actually gone wrong yet.

What we’d recommend doing now

If any of this sounds familiar, the practical next step is a straightforward inventory: what’s actually running these versions, what depends on them, and what a realistic migration timeline looks like given your budget and change windows. Database and domain-controller migrations in particular need proper testing time – they’re not a weekend job. We’re happy to run that audit for you and put a phased plan together, whether that’s an in-place upgrade, a clean rebuild, or a move to Azure.