There is no existing PublicFolder that matches the following Identity

You are not able to list public folders in a co-existence scenario with Exchange Server 2007 and Exchange Server 2010/2013 using the Exchange 2007 EMS or EMC.
You are not able to list public folders in a co-existence scenario with Exchange Server 2007 and Exchange Server 2010/2013 using the Exchange 2007 EMS or EMC.