This is an extension of what was already requested by another user here:
https://community.qlik.com/t5/Suggest-an-Idea/Enhancement-Qlik-Replicate-SQL-authentication-to-Azure...
Based on this ideation Azure AD support was added for SQL DB, but only with user/password authentication.
Our security standards require AAD authentication using service principal, which is not supported for the SQL DB connector, and only supported for the staging store for the Synapse connector and not the Synapse connection itself.
Also we would like to take it another step further and support the retrieval of the secret from an Azure Keyvault, instead of hardcoding it in the connectors configuration.