Azure Data Factory - store credentials in Azure Key Vault

When using Key Vault, application developers no longer need to store security information in their application.

https://docs.microsoft.com/en-us/azure/key-vault/key-vault-overview

Azure Data Factory can benefit from integration with Azure Key Vault as well.

First configure Data Factory service identity

https://docs.microsoft.com/en-us/azure/data-factory/data-factory-service-identity

Then configure Data Factory Access to Azure Key Vault

(Type Data Factory Identity ID when selecting principal for Key Vault Access)

https://docs.microsoft.com/en-us/azure/data-factory/store-credentials-in-key-vault

Configure Key Vault Linked Service in Azure Data Factory

Then configure dataset connection properties to reference the connections string in the Key Vault.

Done :)