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Updates for Exchange Server

Exchange follows a quarterly delivery model to release Cumulative Updates (CUs) that address issues reported by customers. CUs sometimes also add new features and functionality.

Critical product updates are packages that address a Microsoft-released security bulletin or that contain a change in time zone definitions. When in Mainstream Support, critical product updates are released as needed on a monthly basis for the most recently released CU and for the immediately previous CU. When in Extended Support, critical product updates are released as needed on a monthly basis for only the most recently released CU.

To get the latest version of Exchange 2019, download and install Cumulative Update 14 for Exchange Server 2019. Each CU is a full installation of Exchange that includes all updates and changes from previous CUs. When installing a new Exchange server using the latest released CU, you don't need to install Exchange RTM or any previously released CU.

The following table contains links to Exchange Team blog posts ("What's New" information) for this and other Exchange 2019 CUs.

Version Blog post
Exchange 2019 CU14 Released: 2024 H1 Cumulative Updates for Exchange Server
Exchange 2019 CU13 Released: 2023 H1 Cumulative Updates for Exchange Server
Exchange 2019 CU12 Released: 2022 H1 Cumulative Updates for Exchange Server
Exchange 2019 CU11 Released: September 2021 Quarterly Exchange Updates
Exchange 2019 CU10 Released: June 2021 Quarterly Exchange Updates
Exchange 2019 CU9 Released: March 2021 Quarterly Exchange Updates
Exchange 2019 CU8 Released: December 2020 Quarterly Exchange Updates
Exchange 2019 CU7 Released: September 2020 Quarterly Exchange Updates
Exchange 2019 CU6 Released: June 2020 Quarterly Exchange Updates
Exchange 2019 CU5 Released: March 2020 Quarterly Exchange Updates
Exchange 2019 CU4 Released: December 2019 Quarterly Exchange Updates
Exchange 2019 CU3 Released: September 2019 Quarterly Exchange Updates
Exchange 2019 CU2 Released: June 2019 Quarterly Exchange Updates
Exchange 2019 CU1 Released: February 2019 Quarterly Exchange Updates
Exchange 2019 RTM Exchange Server 2019 Now Available

For information about the new features you'll get when you upgrade to Exchange 2019 from previous versions of Exchange, see What's new in Exchange Server.

To get the latest version of Exchange 2016, download and install Cumulative Update 23 for Exchange Server 2016. Because each CU is a full installation of Exchange that includes updates and changes from all previous CUs, you don't need to install any previous CUs or Exchange 2016 RTM first.

The following table contains links to Exchange Team blog posts ("What's New" information) for this and other Exchange 2016 CUs.

Version Blog post
Exchange 2016 CU23 Released: 2022 H1 Cumulative Updates for Exchange Server
Exchange 2016 CU22 Released: September 2021 Quarterly Exchange Updates
Exchange 2016 CU21 Released: June 2021 Quarterly Exchange Updates
Exchange 2016 CU20 Released: March 2021 Quarterly Exchange Updates
Exchange 2016 CU19 Released: December 2020 Quarterly Exchange Updates
Exchange 2016 CU18 Released: September 2020 Quarterly Exchange Updates
Exchange 2016 CU17 Released: June 2020 Quarterly Exchange Updates
Exchange 2016 CU16 Released: March 2020 Quarterly Exchange Updates
Exchange 2016 CU15 Released: December 2019 Quarterly Exchange Updates
Exchange 2016 CU14 Released: September 2019 Quarterly Exchange Updates
Exchange 2016 CU13 Released: June 2019 Quarterly Exchange Updates
Exchange 2016 CU12 Released: February 2019 Quarterly Exchange Updates
Exchange 2016 CU11 Released: October 2018 Quarterly Exchange Updates
Exchange 2016 CU10 Released: June 2018 Quarterly Exchange Updates
Exchange 2016 CU9 Released: March 2018 Quarterly Exchange Updates
Exchange 2016 CU8 Released: December 2017 Quarterly Exchange Updates
Exchange 2016 CU7 Released: September 2017 Quarterly Exchange Updates
Exchange 2016 CU6 Released: June 2017 Quarterly Exchange Updates
Exchange 2016 CU5 Released: March 2017 Quarterly Exchange Updates
Exchange 2016 CU4 Released: December 2016 Quarterly Exchange Updates
Exchange 2016 CU3 Released: September 2016 Quarterly Exchange Updates
Exchange 2016 CU2 Released: June 2016 Quarterly Exchange Updates
Exchange 2016 CU1 Released: March 2016 Quarterly Exchange Updates
Exchange 2016 RTM Exchange Server 2016: Forged in the cloud. Now available on-premises

For information about the new features you'll get when you upgrade to Exchange 2016 from previous versions of Exchange, see What's new in Exchange Server.