Azure Serverless Computing Cookbook - Second Edition

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While adding the SendGrid bindings, you will be prompted to install the extensions as shown in the following screenshot:

In case you don't see them, please delete the output binding and re-create the same. You could also manually install the extensions by going through the instructions mentioned in the article https://docs.microsoft.com/en-us/azure/azure-functions/install-update-binding-extensions-manual.