In preview – Azure Functions support for Microsoft Graph bindings and custom bindings
We're enhancing the Azure Functions bindings support to allow developers to build their own bindings—which means if a customer has a custom data source, they can now easily create bindings for that data source for Azure Functions. This allows not only that customer, but also their own customers to build serverless functions that seamlessly interact with your custom data source.
Additionally, we're also announcing new bindings for Microsoft Graph and Office—which means it's now much easier to access and modify Graph and Office information in your serverless code without having to deal with the intricacies of the Graph and Office API.
Source: Azure Roadmap