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How to Prepare for Exchange Server 2016 & 2019 End Of Life

Exchange Server 2016 & 2019 End Of Life
On October 14, 2025, Microsoft will officially end support for Exchange Server 2016 and 2019. This means for businesses relying on these versions, it’s crucial you understand the implications and plan no so you’re not surprised or hit with unexpected fees at the last minute.

Understanding the End of Life (EOL) for Exchange Server 2016 and 2019 

The end of support means that Microsoft will no longer provide: 

  • Security Updates: No patches for newly discovered vulnerabilities. 
  • Bug Fixes: Unresolved issues that could affect performance or stability. 
  • Technical Support: No assistance for troubleshooting or resolving problems. While your Exchange servers will continue to function post-EOL, operating them without support poses significant risks 

What are the Risks of Continuing to use Unsupported Exchange Servers

1. Security Vulnerabilities 

Without regular security updates, your systems will become prime targets for cyberattacks. Hackers often exploit known vulnerabilities in unsupported software to gain access to your business. 

2. Compliance Issues 

Many industries have strict regulations regarding their data protection rules, using unsupported software can lead to compliance violations, resulting in fines or legal consequences. 

3. Operational Disruptions 

Without bug fixes and technical support you may find minor issues can escalate, leading to system downtimes and loss of productivity for your entire team. 

What are your Migration Options for Exchange 2026 & 2019?

As the EOL date approaches, businesses have two options to choose between which are upgrading and migrating.

Upgrade to Exchange Server Subscription Edition (SE)

Microsoft plans to release Exchange Server SE in the second half of 2025, with the current release date set for July 2025. This version will operate on a subscription model, requiring active software assurance. It’s designed for businesses that prefer to maintain on-premises servers. 

Migrate to Exchange Online (Microsoft 365)

Transitioning to Microsoft 365 ahead of the Exchange end-of-life offers numerous benefits, including, automatic updates to ensure you always have the latest features and security patches installed as well as the option to scale and adjust resources as your business grows. 

Another incredible tool if you are already using Microsoft 365 Services is the increased integration opportunities this migration will allow. 

What are the Steps to Ensure a Smooth Transition from Exchange 2016/2019

  1. Assess Current Infrastructure: Evaluate your existing Exchange setup to understand the scope of migration or upgrade. 
  2. Choose the Right Path: Decide between upgrading to Exchange SE or migrating to Exchange Online based on your business needs. 
  3. Plan the Migration: Develop a detailed plan outlining timelines, resources, and potential challenges ahead of time. 
  4. Test and Validate: Before full deployment, conduct thorough testing to ensure compatibility and performance. 
  5. Train Your Team: Ensure that your staff is familiar with the new system to maximise their productivity ahead of these changes. 

Does the Exchange Server End Of Life Still Sound Daunting?

Don’t worry, that’s what were here for! 

If you’re uncertain about the best course of action or need assistance with the transition, our IT support team is here to help. Contact us today to discuss your options and ensure a smooth transition away from unsupported Exchange versions. 

Picture of Anne-Marie Blazdell

Anne-Marie Blazdell

Anne-Marie Blazdell is a Marketing & Communications Manager with expertise in digital marketing, content creation, and IT solutions. With a strong foundation in graphic design, she trained at Farnborough College of Technology and Southampton Solent University before advancing into marketing and business IT support.

Since joining Syn-Star in 2022, Anne-Marie has specialised in crafting SEO-optimised website content, managing social media, and helping businesses navigate the complexities of IT. Her work bridges the gap between technology and business, making IT more accessible and effective.

Contents

Anne-Marie Marketing Communications Manager

Anne-Marie Blazdell

Anne-Marie Blazdell is a Marketing & Communications Manager with expertise in digital marketing, content creation, and IT solutions. With a strong foundation in graphic design, she trained at Farnborough College of Technology and Southampton Solent University before advancing into marketing and business IT support.

Since joining Syn-Star in 2022, Anne-Marie has specialised in crafting SEO-optimised website content, managing social media, and helping businesses navigate the complexities of IT. Her work bridges the gap between technology and business, making IT more accessible and effective.

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