Question 1

What happens when Msexchange reaches end of life?

Accepted Answer

When Msexchange reaches end of life, it stops receiving security patches, bug fixes, and new features. Currently, 10 Msexchange versions are already EOL. The latest supported version is Msexchange subscription. Running an EOL version exposes your systems to unpatched security vulnerabilities with no official fix available.

Question 2

Is Msexchange subscription still supported?

Accepted Answer

Yes. Msexchange subscription is actively supported. It receives security patches and bug fixes. Check the version table above for the full list of supported Msexchange releases and their exact end-of-life dates.

Question 3

Is it safe to use Msexchange after end of life?

Accepted Answer

No. Running Msexchange after EOL is not safe for production systems. Once a version reaches end of life, newly discovered CVEs are published publicly but never patched — leaving your systems permanently exposed. The only safe path is upgrading to an actively supported Msexchange release.

Question 4

How to upgrade from Msexchange 2019 to Msexchange subscription.x?

Accepted Answer

To upgrade Msexchange from 2019 to subscription: (1) review the official migration guide for breaking changes, (2) test your application against the new version in a staging environment, (3) update dependencies that have version constraints, (4) run your full test suite, (5) deploy with a rollback plan. The earlier you start, the more time you have to resolve compatibility issues before EOL.

Question 5

When is the next Msexchange LTS version?

Accepted Answer

Not all Msexchange releases have a designated LTS status. Check the version table above — LTS releases are marked with an "LTS" badge. Refer to the official Msexchange release policy for information on upcoming long-term support versions.

Question 6

How long does Msexchange support each version?

Accepted Answer

On average, Msexchange supports each release for approximately 116 months (~9.7 years).  The exact EOL date for each version is listed in the table above.

Version	Released	Active support	EOL date	Until EOL	Latest	CVEs	Status
subscription	Jul 1, 2025	—	No	—	15.2.2562.41	—	Active
2019	Oct 22, 2018	Jan 9, 2024	Oct 14, 2025	238d ago	15.2.1748.43	—	EOL
2016	Oct 1, 2015	Oct 13, 2020	Oct 14, 2025	238d ago	15.1.2507.66	—	EOL
2013	Jan 9, 2013	Apr 10, 2018	Apr 11, 2023	1155d ago	15.0.1497.48	—	EOL
2010	Nov 9, 2009	Jan 13, 2015	Oct 13, 2020	2065d ago	14.3.513.0	—	EOL
2007	Mar 8, 2007	Apr 10, 2012	Apr 11, 2017	3346d ago	8.3.517.0	—	EOL
2003	Sep 28, 2003	Apr 14, 2009	Apr 8, 2014	4445d ago	6.5.7654.4	—	EOL
2000	Nov 29, 2000	Dec 31, 2005	Jan 11, 2011	5628d ago	6.0.6620.7	—	EOL
5.5	Feb 3, 1998	Dec 31, 2003	Jan 10, 2006	7455d ago	5.5.2653	—	EOL
5.0	May 23, 1997	Dec 31, 2003	Jan 10, 2006	7455d ago	5.0.1460	—	EOL
4.0	Jun 11, 1996	—	Yes	—	4.0.996	—	EOL

Msexchange End of Life Dates

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