Long Term Release
A Long Term Supported (LTS) version is available from the Downloads page.
The LTS version is fully supported for 13 months from the release of that LTS version. It is highly recommended that customers deploy the LTS version and is most suitable for customers who prefer not to upgrade their major version more often than once a year.
To access the LTS version, from Proofpoint Data Security & Posture, select the Administration app. Select Endpoints > Downloads. Choose to download the long-term-supported-release version.