Exchange Server 2016 end of support
Is Exchange Server 2016 still supported?
No Support ended
Support for Exchange Server 2016 ended on October 14, 2025. Paid Extended Security Update period is listed until October 2026.
Key dates Vendor-confirmed
| Release date | October 1, 2015 |
|---|---|
| Mainstream support ends | October 13, 2020 |
| Extended support ends | October 14, 2025 |
| Extended Security Update period (paid) | October 2026 |
Notes: Dates from Microsoft's lifecycle page (start date shown as the release date). Microsoft's Exchange team (July 2026): the Period 2 Exchange 2016/2019 ESU programme ends with October 2026 and will not be extended again; after October 2026 there are no further updates. Stored as month precision (end of October 2026); endoflife.date had November 1, 2026.
Source quality: Every date shown is confirmed in the vendor's own content; anything shown as Unknown is not yet confirmed anywhere.
What the end of support means
- Mainstream support usually includes bug fixes, security updates and (for ERP) regulatory and tax updates. When it ends, non-security fixes and new features stop.
- Extended support usually means security updates only. Exact terms differ by vendor and may require a support contract.
- After the final end date the software keeps running, but the vendor no longer ships fixes or security patches. Known vulnerabilities stay open, and compliance or cyber-insurance requirements may treat it as unsupported software.
- Extended Security Update period extends security fixes for a limited time for a fee. Treat it as a bridge to an upgrade.
Upgrade paths
Upgrade to a supported Exchange Server version
Staying on the same product usually means the least retraining. Check the upgrade path and system requirements in the vendor documentation; some upgrades must go through an intermediate version.
Buy more time
Extended Security Update period is listed for this version (paid). It typically covers security fixes only and is meant as a bridge, not a destination.
Sources
- learn.microsoft.com/en-us/lifecycle/products/exchange-server-2016
- techcommunity.microsoft.com/blog/exchange/reminder-exchange-2016-and-2019-esu-program-ends-in-october-2026/4539033
- MicrosoftDocs/SupportArticles-docs: Exchange/ExchangeServer/administration/exchange-2019-2016-end-of-support.md
Vendor lifecycle page for the product: https://learn.microsoft.com/lifecycle/products/?terms=Exchange%20Server
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