Although it is most certainly true that the most ideal way to show Power BI for the Office 365 site dashboard and/or report should be straight from the IFrame in Dynamics CRM, just like the way Power View add-in from Excel uploaded to SharePoint does, this is not possible with the Power BI site for Office 365 at the moment because Power BI will not allow itself to be loaded into IFrames due to security reasons. If you attempt to add the Power BI for Office 365 dashboard and report link to IFrame using the properties form, you will be prompted with an unresponsive Sign In page:
Although there may be possible custom-developed solutions to get around presenting the dashboards in Dynamics CRM, it would include the advanced implementation configuration that we will not focus on in this book.