Deepthi Goguri notes a change:
When trying to connect to a SQL database within Power BI Desktop January 2026 met with certificate chain trust error when trying to connect to the SQL Database using database DNS. Below is the error:
Microsoft SQL: A connection was successfully established with the server, but then an error occurred during the login process. (provider: SSL Provider, error: 0 – The certificate chain was issued by an authority that is not trusted.)”
The workaround for this is a bit weird, but Deepthi provides a solid explanation.