Apparently, in PBI the domain is used, not the email. Good to know if row level security is implemented in PBI someday (note: currently it’s only available in the Power BI Service).
OK, now let’s upload this report to the Power BI Service so we can implement the RLS. When the report is opened, it seems that my carefully crafted measures are ignored. Maybe Power BI ignores the USERNAME() function as long as there is no RLS defined.
I like the fact that you can test by role, making it a lot easier to see what others would see under those circumstances and finding bugs with security implementation. If you have any non-public information and you use Power BI, this is a must-read.