Microsoft has officially announced that Exchange Server 2016 and Exchange Server 2019 will reach the end of support on October 14, 2025. If your organisation still relies on these versions, it’s time to start planning your next steps to ensure security, compliance, and seamless email communication.
What End of Support Means for You
After October 14, 2025, Microsoft will no longer provide:
- Security updates – Leaving your servers vulnerable to cyber threats.
- Bug fixes – Unresolved issues may impact stability and performance.
- Technical support – Microsoft will no longer assist with troubleshooting.
- Time zone updates – Changes in global time zones won’t be applied automatically.
Although your Exchange 2016/2019 servers will continue running, continuing to use them after end-of-life poses significant security and operational risks.
Your Best Options for Moving Forward
To avoid security risks and service disruptions, organisations have two primary paths:
1. Migrate to Exchange Online (Microsoft 365)
The best and most future-proof option is to move to the cloud with Exchange Online or Microsoft 365. This migration provides:
- Continuous security updates – Eliminating the need for manual patching.
- Advanced AI features – Access to Microsoft Copilot and cloud-based innovations.
- Reduced IT maintenance – No more on-premises Exchange infrastructure to manage.
- Microsoft FastTrack Support – Free migration assistance for eligible organisations.
If your organisation values scalability, security, and cost efficiency, moving to Microsoft 365 is the best choice.
2. Upgrade to Exchange Server Subscription Edition (SE)
If your organisation requires an on-premises email solution, Exchange Server SE is Microsoft’s next-generation Exchange Server, set to release in the second half of 2025.
- If you’re on Exchange Server 2019, you can directly upgrade to Exchange Server SE.
- If you’re on Exchange Server 2016, you’ll first need to upgrade to Exchange 2019 before moving to SE.
- Exchange Server 2013 and earlier versions must be removed before installing Exchange 2019 or SE.
Organisations choosing this path should start upgrading to Exchange 2019 now to ensure a smooth transition.
Microsoft’s Exchange Server Technology Adoption Program (TAP)
For businesses using Exchange 2019 that want early access to Exchange Server SE, Microsoft offers the Exchange Server TAP program. Benefits include:
- Pre-release access to Exchange updates.
- Direct feedback channels with Microsoft engineers.
- Complimentary support for TAP-related issues.
Interested organisations should apply for TAP to get ahead of the transition curve.
Other Microsoft Products Reaching End of Support
In addition to Exchange Server 2016 and 2019, the following products will also reach end of support on October 14, 2025:
- Microsoft Office 2016 & 2019
- Outlook 2016 & 2019
- Skype for Business 2016 & 2019
- Skype for Business Server 2015 & 2019
- Microsoft Project 2016 & 2019
- Microsoft Visio 2016 & 2019
If your business relies on any of these products, it’s essential to plan for upgrades or migrations.
Act Now to Secure Your Business
With only a few months left before end-of-support, now is the time to act. Delaying your transition could result in security vulnerabilities, compliance risks, and costly downtime.
Next Steps:
- Assess your current Exchange environment – Identify if you’re on 2016 or 2019.
- Decide on a migration or upgrade path – Choose between Exchange Online or Exchange Server SE.
- Plan for implementation – Migrations take time, and waiting too long could lead to rushed decisions.
- Seek expert guidance – Our team at Rachis Technology is here to help ensure a seamless transition.
For more details, visit Microsoft’s official announcement.
Need assistance with your migration or upgrade? Contact us to discuss your options and develop a migration plan tailored to your needs.