Thx, but doesn't work.
WebDav source is configured and works under Win10 Explorer, as expected.
In PBI I can use plenty of data from web sources (csv, xls mainly) by the web connector (no WebDav sources). But no way to establish WebDav source in PBI with basic Usr/Psw authentication. Just error there:
Unable to connect. Details: "Access to the resource is forbidden."
Changed permission setup in Data Source Setting for the source address. Still the same stage.