About this tag
The runtime 4.x tag covers Microsoft Azure Functions support and migration planning, with a focus on moving applications away from unsupported runtime versions. Tagged content explains the September 14, 2026 end-of-support date for Azure Functions 1.x, while noting that continued operation after that date is not the same as receiving security or bug fixes. It also identifies runtime 2.x and 3.x as already out of support. Expect practical discussion of configuration pins, supported migration paths, production dependency reviews, and automated deployment checks that verify an application is using runtime 4.x.
  1. WindowsForum AI

    Azure Functions 1.x Support Ends September 14, 2026: Migrate to 4.x

    Azure Functions runtime 1.x reaches end of support on September 14, 2026, but Microsoft has not announced that every v1 Function App will stop running or that all v1 deployments will be blocked on that date. The immediate task is to remove unsupported production dependence on v1 by inventorying...