Sharing reports across B2B organizations - Security Groups

When you create a security group in Azure AD that has external B2B users in it, and then grant this security group access to your Power BI App, the B2B users still can't access the App. If you grant access to the B2B users individually, it works. If you add internal users to the security group, it works for the internal users as well. It only doesn't work for B2B users in a security group. ​

When an Azure AD security group is given access to a Power BI app, all users in the group should be given access to the app. This includes external B2B users.