Windows Server 2016 reaches the end of extended support on 12 January 2027. After that date Microsoft stops issuing security updates for it unless the server is covered by paid Extended Security Updates. The server keeps running, but every vulnerability found afterwards stays open. For most Singapore SMEs the practical answer is to replace a server that is now eight to ten years old, not to patch around it.
What exactly ends on 12 January 2027?
Mainstream support for Windows Server 2016 ended in January 2022. Since then it has received security fixes only. On 12 January 2027 those stop too, along with Microsoft technical support.
| Version | Mainstream support ended or ends | Extended support ends |
|---|---|---|
| Windows Server 2016 | January 2022 | 12 January 2027 |
| Windows Server 2019 | January 2024 | January 2029 |
| Windows Server 2022 | October 2026 | October 2031 |
| Windows Server 2025 | 2029 | 2034 |
Source: Microsoft product lifecycle pages and the Windows Server blog. Compiled 12 November 2026.
CALC: from 12 November 2026 to 12 January 2027 is 18 + 31 + 12 = 61 days. A server order, delivery, build and data migration rarely fits inside that without planning now.
What are the risks of doing nothing?
An unpatched server is not broken on day one. The risk builds as new flaws are published and never fixed. Three things matter for a small business:
- Ransomware exposure. File servers and domain controllers are the usual targets. See our analysis of how ransomware reaches shared storage.
- Compliance questions. The PDPA expects reasonable security arrangements for personal data. Running an unsupported operating system is hard to defend after an incident. Check your own obligations with your DPO or adviser.
- Software support. Accounting, payroll and backup vendors drop support for old server versions over time.
What are the four options?
| Option | Best for | Main cost | Watch out for |
|---|---|---|---|
| Replace the server with Windows Server 2025 | Offices running Active Directory or Windows applications | New hardware, core licences, CALs | Lead time on configured servers |
| In-place upgrade on existing hardware | Servers bought in the last four or five years | Licences and labour | Old hardware may not be certified for the new version |
| Move file sharing to a NAS | Offices that only use the server for shared folders and backup | NAS and drives | Does not run Windows applications |
| Extended Security Updates | A legacy application that cannot move yet | Annual fee per core | Temporary, up to three years, and not a fix |
Extended Security Updates buy time for one stubborn application. They are a bridge, and the bridge ends in January 2030.
What does the licence side cost?
Windows Server Standard is licensed per core, with a 16-core minimum per server, plus a Client Access Licence (CAL) for every user or device. Our Windows Server licensing guide has the full rules.
CALC for a 20-user office on one 16-core server, using listed Windows Server 2022 prices as a guide: one Standard 16-core licence at S$1,275, plus four 5-user CAL packs at S$320 each (S$1,280). Total S$1,275 + S$1,280 = S$2,555 in licences, before hardware. CALs must match or exceed the server version, so Windows Server 2016 CALs do not cover a 2022 or 2025 server.
Should the file server become a NAS?
If the old server only shares folders and holds backups, a NAS does the same job with no CALs. If it runs Active Directory, a database or a Windows-only application, keep a server. Our comparison of server vs NAS for a small office walks through the decision.
Buying in Singapore
Prices below were listed on 12 Nov 2026; prices change; ask for a current quotation.
- Dell Microsoft Windows Server 2022 Standard ROK (16 Core), S$1,275. ROK licences are tied to that brand of server.
- HPE Microsoft Windows Server 2022 Standard ROK 16 Core, S$1,305.
- Dell Microsoft Windows Server 2022/2019 CAL (5 User), S$320.
- Synology DiskStation DS925+, S$1,260, for offices moving file sharing off Windows.
- Price on request: HPE ProLiant DL320 Gen11, Dell PowerEdge R360, Lenovo ThinkSystem SR250 V3, Lenovo ThinkSystem ST650 V3 tower, and Windows Server 2025 licences.
To start, use Request for Quotation on the product page, call (65) 6978 3502, email Sales@sourceit.com.sg or use our contact page.
Frequently asked questions
Will Windows Server 2016 stop working after 12 January 2027? No. It keeps running, but it receives no more security updates unless covered by Extended Security Updates.
Can I upgrade straight from 2016 to 2025? Microsoft documents in-place upgrade paths between versions, but hardware that old is often not certified for the new release. Confirm with the server maker before planning on it.
How long do Extended Security Updates last? Up to three years after end of support, so to January 2030, bought through Microsoft licensing channels.
Do I need new CALs? Yes if you move to a newer server version. CALs must be the same version as the server or later.
SourceIT Approved
Researched and verified by the SourceIT team for Singapore buyers.
