Synergy/DE Release Strategy

Supported Versions

The table below shows end-of-support dates for all Synergy/DE versions.

Synergy/DE Version	Release Date	End-of-Support Date
12.4.1.1003 Feature Release	June 13, 2025	TBD (The date of the next feature release or LTS release—plus three months)
12.4.1.1002 Feature Release	Mar. 17, 2025	Sept. 13, 2025 (The date of the next feature release or LTS release—plus three months)
12.4.1.1001 Feature Release	Aug. 30, 2024	June 17, 2025 (The date of the next feature release or LTS release—plus three months)
12.3 LTS Release	Mar. 8, 2024	Mar. 8, 2028 or later (Four years after its release date OR one year after the next LTS version is released—whichever is later)
12.2.1.1010 Feature Release	Dec. 14, 2023	June 8, 2024 (The date of the next feature release or LTS release—plus three months)
12.2.1.1008 Feature Release	Oct. 4, 2023	Mar. 14, 2024 (The date of the next feature release or LTS release—plus three months)
12.1 LTS (Long-Term Support) Release	Apr. 1, 2022	Apr. 1, 2026 (Four years after its release date OR one year after the next LTS version is released—whichever is later)
11.1 and lower	Sept. 30, 2019 (11.1)	Retired 11.1 reached end-of-support Sept. 30, 2023, four years after its release date

Critical fixes (for production-down issues) and urgent security updates will be provided for each Synergy/DE version until its end-of-support date. Other fixes will be provided in LTS updates and subsequent feature releases.

To keep your system secure and performing well, we recommend you stay current with your Synergy/DE version and updates to that version. When designing each new version of Synergy/DE, we carefully consider the migration requirements and focus on keeping them to a minimum, to make upgrading as easy as possible. See the Migration Information on our website. We also recommend that you keep current with your operating system versions, upgrading as necessary when vendors announce retirement plans. See Synergy/DE Platforms for specific OS support information.

For Synergy DBL Integration for Visual Studio (SDI), only the current build is supported. Each subsequent SDI build immediately replaces the previous build as the supported version.

Synergy/DE’s runtime version targeting enables you to use the latest feature release and SDI tools while deploying to an LTS release or feature release production platform.

Long-Term Support (LTS) Releases

Our release strategy for Synergy/DE products combines long-term support (LTS) releases with feature releases. LTS releases provide a stable platform that’s supported for an extended period of time, with only quality, security, and platform updates—no new features. The primary characteristics of an LTS release are

A two-year release cadence, allowing you to plan your own updates accordingly
A four-year minimum support period (or one year after the next LTS release ships, whichever is longer)
Limited changes to the code base

Because Synergy has close ties with Microsoft .NET, we’ve broadly aligned our release schedule with the .NET release schedule, which also uses an LTS strategy and a two-year cadence. Version numbers for LTS releases have an odd major revision number, for example, 12.1.

Feature Releases

Feature releases deliver the latest technologies and enhancements, which build cumulatively to the next LTS release. The primary characteristics of a feature release are

Access to new features and enhancements as soon as they’re completed
A more frequent release cadence
A shorter period of support (three months after a subsequent feature or LTS release)

While feature releases are fully tested, quality may be lower in areas where new code has been added or significant changes have been made. Quality will solidify as developers exercise the new features and our automated test suites are extended. Version numbers for feature releases have an even major revision number, for example, 13.2. Fixes to a feature release will only be provided via the next feature (or LTS) release.