Exchange Server Timeline

Exchange Server 2019 will leave Extended support Oct. 14, 2025, the same day as Exchange Server 2016. This means that customers can’t significantly extend the supported life of an Exchange Server 2016 installation by upgrading to Exchange Server 2019.

Exchange Server 2010 and Exchange Server 2013 are still supported, but Microsoft will not support Exchange Server 2010 in hybrid configurations with Exchange Online after Jan. 2020. Exchange Server 2010 is also not supported for on-premises coexistence with Exchange Server 2019, complicating migration.

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