Version 3.x of the Azure Cosmos DB extension for Azure Functions is built on the Microsoft.Azure.DocumentDB SDK, and both the SDK and the extension will be retired on 31 August 2024. Update to extension version 4.x, which is built on the newer Microsoft.Azure.Cosmos SDK by that date to continue receiving support. See migration guide for details.
While applications using extension version 3.x will be supported until 31 August 2024, if you experience a problem with the root cause in the underlying SDK, you’ll need to update to extension version 4.x to get support.
After that date, applications using extension version 3.x will continue to run but won’t get new features, security patches, or performance optimizations.