Sorry for the previous confusing status. We are not planning to allow Azure AD B2C users to have access to powerBI. We are however starting work to enable audit data from Azure AD B2C to be surfaced through PowerBI.Lukasz Pawlowski commented
Hi folks, Lukasz here from the Power BI team. The comment above is not accurate. Power BI does not plan to support B2C. I am attempting to have this error corrected. Please read our Azure AD B2B with Power BI white paper for alternatives. http://aka.ms/powerbi-b2b-whitepaper
You can share reports and dashboards with consumer email accounts, but this is not the same as supporting B2C.