Microsoft have changed their license policy for Power BI Free from 1st of June 2017. To share and access shared reports, Power BI Pro ($9.99 per user per month) is needed. Microsoft offer a 12 month free trial for those users who have used Power BI between 2nd of Mai 2016 and 2nd of Mai 2017. All these users should get a notification today like the one attached. We recommend to Activate this trial.
There is also a less secure solution for sharing Power BI reports for free and with no Power BI sign-in (license agreement) needed at all. This solution is called “Publish to web” and means that all users get a URL (HTML link) to the report. The disadvantage with this solution is that the URL is public, meaning that anyone receiving this URL can access the report (off course, someone need to share the link – the link is not searchable from etc. Google).