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 13 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 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.
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.
- To upgrade to the latest CU after you've downloaded it, see Upgrade Exchange to the latest Cumulative Update.
- For downloads and updates for other versions of Exchange, see Exchange Server build numbers and release dates.