Microsoft Exchange Server 2016 and 2019 reached end of support on 14 October 2025. As of now, Microsoft no longer provides security updates, bug fixes, or technical support for these versions.
If your business still runs Exchange 2016 or 2019, you are running on borrowed time. Your email infrastructure is too critical to ignore, and the migration is already overdue. This is not a distant problem to solve later—it is an immediate security and operational risk that needs attention now.
Here's what you need to know, and the practical steps to take.
Why This Matters for Your Business
When a software version reaches end of support, security vulnerabilities discovered after that date go unfixed. Your email server becomes an increasingly attractive target for attackers, and you lose the protection of vendor-backed updates.
For a business that handles customer data, invoicing, staff communications, or compliance-sensitive work, running an unsupported email system is a visible and preventable risk. Your accountant, your auditor, or your insurance provider may eventually ask whether your email infrastructure meets your own security standards.
On the practical side, hardware ages, storage fills up, and managing an ageing Exchange server takes time and money. The real question is whether that investment makes sense for your business, or whether your resources would be better spent elsewhere.
Your Options
You have three realistic paths: Microsoft 365, KerioConnect, or Exchange Subscription Edition. Each one suits different business needs.
Microsoft 365
Microsoft 365 is a cloud-based email and productivity suite. Your mailboxes, calendars, Teams messaging, and documents live in Microsoft's data centres. It's the default choice for many businesses because setup is straightforward, feature parity is high, and Microsoft handles all the infrastructure.
For many smaller teams, Microsoft 365 can reduce on-site maintenance and simplify patching, licensing, and availability planning.
The trade-off is that your email lives on servers you do not own or control, in data centres outside the region. That is acceptable for most SMBs, but it is not the right answer if your compliance requirements, customer agreements, or business preference demand that your data stay on your own infrastructure.
KerioConnect
KerioConnect is an on-premises email, calendar, and collaboration system. You install it on your own server (which can be modest hardware—it runs on Windows, macOS, or Linux), you own the data, and you control when updates happen.
KerioConnect is designed as a modern alternative to Exchange for businesses that want a simple migration path from older Exchange systems, a lighter footprint, and predictable subscription planning. You still need to account for server health, patches, backups, security monitoring, and support.
KerioConnect suits businesses that:
- Need their email data to remain on-premises for compliance or data sovereignty reasons.
- Want lower per-user costs and simpler hardware requirements than Exchange.
- Are comfortable managing a small on-site system or having a managed IT provider handle it.
- Need basic email, calendars, and some collaboration, but do not need the full Microsoft 365 feature set.
Unlike Microsoft 365, KerioConnect does not include Teams, SharePoint, or advanced Microsoft integrations. If your team relies heavily on Teams for chat, document collaboration, or video calls, Microsoft 365 may still be the better fit.
Exchange Subscription Edition
Microsoft also offers Exchange Server as a subscription—you pay a monthly fee to run the latest version of Exchange on your own hardware. This gives you the Exchange experience and the latest security updates, but you manage the infrastructure.
For most SMBs in Trinidad and Tobago, Exchange Subscription Edition sits between KerioConnect and Microsoft 365 in cost and complexity. It is a valid option if you have existing Exchange expertise in-house or a managed IT partner who is set up to support it.
How to Decide
Start with three questions:
1. Where does your data need to live?
If your business agreement, compliance requirements, or customer contracts require that email stay on your own servers or in a specific jurisdiction, cloud-only solutions like Microsoft 365 are ruled out. That points to KerioConnect or Exchange Subscription Edition.
If cloud hosting is acceptable or preferred, Microsoft 365 simplifies your life and removes the on-site infrastructure burden.
2. How much technical overhead can you absorb?
Microsoft 365 requires no on-site management: Microsoft handles patches, backups, and hardware refresh. You pay the monthly fee and move on.
KerioConnect and Exchange Subscription Edition require someone—either in-house or an outsourced IT provider—to manage servers, apply patches, monitor disk space, and ensure backups work. That is a real cost, even if it is not a fee you see explicitly.
3. What features does your team actually use?
If you use Microsoft Teams, SharePoint, advanced collaboration features, or tight Office 365 integration, Microsoft 365 is the path of least resistance.
If email, calendars, and basic shared folders cover your needs, and you do not need the full Microsoft ecosystem, KerioConnect can deliver that more simply and at lower cost.
Migration and Timing
Migrating email is not trivial, but it is routine work. The process typically takes a few weeks to a few months depending on your mailbox size, archive requirements, and how much cutover planning you need.
A common approach is to migrate department-by-department or team-by-team, so you can validate the new system before everyone moves. This also gives your staff time to adapt to any interface changes.
If you have not already begun the migration, start now. You cannot afford to delay further.
What We Recommend
There is no one-size-fits-all answer. Microsoft 365 is the right choice for many teams. KerioConnect is a solid fit if you need data sovereignty, lower ongoing costs, and a lighter on-site footprint. Exchange Subscription Edition is viable if you already have Exchange expertise.
The important thing is to make a deliberate choice based on your actual business needs and get the migration started immediately.
Next Steps
If your business still runs Exchange 2016 or 2019, here is what to do:
- Audit your current setup. How many mailboxes do you have? How much archive data? Are there shared calendars or resource accounts that depend on Exchange? Do you have security gaps or compliance issues you know about?
- Define your constraints. Does data sovereignty matter? Do you need the full Microsoft 365 suite, or just email? What is your risk tolerance?
- Get a realistic cost and timeline estimate. Migration is usually straightforward, but surprises happen. A qualified partner will assess your environment and give you a clear picture of what the work entails and what it will cost.
- Test your chosen solution before full rollout. Set up a pilot group and validate that the new system meets your needs before you commit the whole business.
- Plan your cutover carefully. Avoid surprise outages or data loss by planning the migration in stages.
Blue Chip Technologies can help you assess your current Exchange setup, walk through your options—including KerioConnect and Microsoft 365—and plan a migration that fits your business constraints, timeline, and budget. We manage email infrastructure for SMBs across Trinidad and Tobago and handle migrations from older Exchange versions.
If you would like a practical review of your current Exchange or email setup, get in touch. We can help you understand your options and build a realistic plan to get off an unsupported system.
Sources
- GFI Software: Exchange 2016/2019 End of Life: Your Migration Opportunity
- Microsoft End of Support for Exchange Server 2016 and Exchange Server 2019: 14 October 2025
Need help choosing a safe path? Blue Chip Technologies can review your current email setup and map the most practical migration route.
