The questions above can be resolved fairly quickly by following the below guidance. Am I able to impose features like multi-factor authentication on my external users that will be gaining access?.Is there a certain number of external users I am limited to invite in?.What does the 1:5 Active to Guest User licensing ratio mean and when does it apply?.Does an external user require a license to access SharePoint Online?.Almost every time we speak with clients during the discovery phase of their SharePoint Online extranet, there is a sense of confusion when it comes to the Microsoft external user licensing requirements.
