I was configuring a User Profiles and Properties Import Connection today and kicked off a Full Crawl.

As you can see from the above screen it states 'The operation completed successfully'...but it did not obviously crawl my entire domain as there are only 4 user profiles.

I viewed the Import logs and found this error 'The profile import default access account is set to use the default content access account which has not been specified'. Kudos to the Microsoft team for putting a log error in with a resolution. But surely the it should have failed the Import job.

Granted, it says Last log error, which in this screen shot appears to be spsimport://<guid>, but I'm not sure where that is coming from as I only have one Import Connection which is the spsimport://cpmining one.

To fix this error I went into 'Configure Profile Import' and set the 'Default Access Account' by specifying a service account in the domain that has Read access to Active Directory. Also, in the actual 'Import Connection' I had to set the 'Authentication Information' with the same account also.