Microsoft has introduced an important change in their licensing model for SharePoint 2013 by removing the need to acquire client access licenses (CAL) for external users in extranet and internet sites scenario. Yes, that’s correct no CALs are required for external users in SharePoint 2013. For some more info about licensing check out the links below:
- SharePoint 2013 licensing overview page
- SharePoint feature availability across on-premises solutions (Technet) – which compares Standard edition vs Enterprise edition is part of the SharePoint Online Service Description, also provides a clue about what Microsoft is currently focusing on.
- Licensing Brief – Licensing Microsoft SharePoint Server 2013 – explains common usage scenarios such as intranet, extranet and internet