Retirement: Service Fabric support for Windows Server 2019 ends on March 31, 2027 - upgrade to Windows Server 2025

Service Fabric will end support for all clusters running on Windows Server 2019 on March 31, 2027. Customers must upgrade to Windows Server 2025 by this date to remain in a supported state.

This change aligns Service Fabric’s Windows OS image support model with mainstream OS support timelines, consistent with Linux and other Azure platforms. Service Fabric will no longer support Windows Server OS images beyond their mainstream support end date.

This change strengthens security posture, reduces operational complexity, and enables continued innovation on modern platforms.

Note: While Virtual Machine Scale Sets will continue to function on Windows Server 2019 beyond March 31, 2027, Service Fabric support will not.

Required Action:

Upgrade all Service Fabric clusters running Windows Server 2019 to Windows Server 2025 before March 31, 2027 to remain in a supported state. This support end date applies to all Service Fabric environments.

How to upgrade:

OS image upgrades are performed by scaling cluster node types and do not impact applications when executed using supported procedures:

While some documentation references upgrade from Windows Server 2019 to 2022, the same process applies all supported Windows Server OS image upgrades, including Windows Server 2025.

Learn more:

• Scale up a Service Fabric primary node type - Microsoft Learn
• Scale up a Service Fabric non-primary node type - Microsoft Learn
• For questions, visit Azure Service Fabric - Microsoft Q&A
• Documentation