End of Support for Exchange Server 2016 and Exchange Server 2019: T-12 Months

On October 14, 2025, one year from today, Exchange Server 2016 and Exchange Server 2019 Support has ended.

After October 14, 2025, Microsoft will no longer provide technical support for issues you may encounter with Exchange 2016 or Exchange 2019, including:

• Technical support for problems that may arise.
• Bug fixes for issues that have been discovered and may impact the stability and usability of the server.
• Security fixes for any vulnerabilities discovered that may make the server vulnerable to security breaches; and
• Time zone update.

Of course, customer installations of Exchange 2016 and Exchange 2019 will continue to run beyond October 14, 2025. However, as the end-of-support date approaches and future security risks may arise, we strongly encourage customers to take action now.

Our recommendations are for our customers to Migrate to Exchange Online Or, prepare your organization to: Upgrade to Exchange Server Subscription Edition (SE) It is scheduled to be released in the first half of CY2025.

Migrate to Exchange Online or Microsoft 365

We believe that a full migration to Exchange Online or Microsoft 365 provides the best value and user experience. Migrating to the cloud is the best and simplest option to help you break your Exchange Server deployment. By migrating to the Microsoft cloud, you can take your on-premises deployments a step further and benefit from new features and technologies, including advanced generative AI technologies that are available in the cloud but not on-premises.

If you’re migrating to the cloud, you can use the Microsoft FastTrack service. FastTrack shares best practices and provides tools and resources to make your migration as smooth as possible. Best of all, you’ll get support engineers to help you plan and design your last mailbox migration. For more information about FastTrack, see: Microsoft Fast Track.

Preparing to upgrade to Exchange Server SE

Earlier this year we Exchange Server Roadmapand details on how to do so. Upgrade to Exchange Server SE If you want to continue running Exchange Server on-premises.

If you’re running Exchange 2019, we recommend that you keep your Exchange servers up to date and upgrade to Exchange Server SE when possible.

If you’re running Exchange 2016, we recommend performing a legacy upgrade to Exchange 2019 now and then performing an in-place upgrade to Exchange Server SE if possible. You have the option to perform a legacy upgrade from Exchange 2016 to Exchange Server SE RTM and skip Exchange 2019 entirely. However, with less than four months left between the release of Exchange Server SE and the end of support for Exchange 2016, there may not be enough time depending on the size of your deployment and other factors (in-place upgrade from Exchange 2016 to Exchange 2016). Exchange SE is not available) This is why we recommend to you Upgrade to Exchange Server 2019 now, Exchange 2016 Server RetirementIf available, perform an in-place upgrade to Exchange Server SE.

If your organization still has Exchange Server 2013 or earlier, you must first uninstall it before installing Exchange Server 2019 CU15 or upgrading to Exchange Server SE.

Exchange Server Technology Adoption Program

If your organization is currently running Exchange 2019 and you want to test and evaluate a pre-release build of Exchange Server 2019 CU15 or later, Exchange Server SE. Exchange Server Technology Adoption Program (TAP).

There are many benefits to participating in Exchange Server TAP, including the ability to provide comments and feedback on future updates, develop a close relationship with the Exchange Server engineering team, and receive pre-release information about Exchange Server. TAP members can also receive support from Microsoft for TAP-related issues at no additional cost.

All nominations are reviewed and vetted before acceptance. No customer will have access to any pre-release downloads or information until all legal paperwork has been properly executed. Nomination does not imply acceptance, as not all candidates are selected for TAP. If you have received preliminary approval, you will be contacted to begin the necessary paperwork.

Even if you are not participating in the TAP program, you can test Exchange SE equivalent code in your organization by installing Exchange 2019 CU15 (if available) as follows: our announcement.

Related Microsoft products reaching end of support on October 14, 2025

In addition to Exchange Server 2016 and Exchange Server 2019, several other products are also available, some of which are often used in conjunction with Exchange Server. Support ends or retirement on October 14, 2025include Microsoft Office 2016, Microsoft Office 2019, Outlook for 2016, Outlook for 2019, Skype for Business 2016, Skype for Business 2019, Skype for Business Server 2015, Skype for Business Server 2019And more.

you can Retrieve product and service life cycle information To get more information about Microsoft products and services

Additional notice

For more information about other end-of-support announcements, see the following blog posts:

Exchange Server Engineering Team