PF migration 2007 -> 2013 FailedOther

A Public folder migration 2007 -> 2013 is failing with the status detail: FailedOther

Error message: There are multiple primary SMTP addresses. Please ensure there is only one primary address for address type.

I can see the Identity as a guid, but can’t seem to identify what public folder is causing the error. Is there a way to see GUID to PF Names mapping?

Thanks