https://www.bleepingcomputer.com/news/security/microsoft-exchange-server-2013-reaches-end-of-support-in-90-days/ > Microsoft warned customers today that Exchange Server 2013 will reach its extended end-of-support (EOS) date 90 days from now, on April 11, 2023. > Exchange Server 2013 was released in January 2013 and has already reached the mainstream end date more than four years ago, in April 2018.