How to open shared dashboard with private email

Hi NLblabla ,

There are potential issues like caching and "how" you are signed in that make the messaging difficult to make clear (I can be signed into my browser with my Bing account, open my organization's Power BI service signed in with my EPM Strategy account and then open Power BI desktop with a third account to see a different account's reporting.)  

From your note:

"External user already has Power BI pro => I can share the dashboard and he can logon and see it without any problems."   Yes, assuming that the share has the right level of sharing AND that you are using the same ID (share it with the exact userid that they have their license assigned to).

"External user doesn't have Power BI pro on his business or private Microsoft account => We have to add an guest account in AAD, give that Power BI pro, and then he can logon with his own business address without any problems."   Yes, if you using the exact same userid - if you create a [email protected] in your AAD then Collin has to sign in with [email protected] and NOT with Collin's own [email protected]     If you can create in your AAD a "[email protected]" (which is not usually the case that you create AAD accounts but I am not an AAD expert) then Collin can use his own business' address.