While trying to configure import user profiles from AD, encountered the following warning message:
'This directory service setting has not been validated because the current user is not authenticated to the directory. It may be a valid setting. Do you want to save this directory service connection setting?'
This could happen when in configurating the Import Connection, 'Use Default Account' is selected. This default account refers to the application pool account. If this is a local account user profiles cannot be imported. In the Authentication Information section in the bottom of the Edit Connection page, click 'Specify Account' and specify a domain account. Go back to the 'User Profiles and Properties' page and 'Start full import'.