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.
Azure Data Factory can benefit from integration with Azure Key Vault as well.
First configure 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)
Configure Key Vault Linked Service in Azure Data Factory
Then configure dataset connection properties to reference the connections string in the Key Vault.