http://blogs.technet.com/b/uspartner_ts2team/archive/2010/06/30/sharepoint-foundation-licensing.aspxQ: (from Maureen) I have client that would like to open their SharePoint site up for access by their customers. I want to figure out if they should buy individual Windows Server CALS for the external customer users or an external connector. Would youen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)