Exchange 2003 to Exchange 2010 Public Folder Problem

Hello All,

Please be noted of my environment first.

1. Exchange Servers : 2003 & 2010 coexistance

3. Public Folders are on Exchange 2003 Server & Replica server is Exchange 2010

We are facing problem for Mail-enabled Public Folder. If we dismount Public Folder database on Exchange 2003 server. We are able to receive internal emails for Mail-enabled public folders but are not getting external emails for Mail-enabled public folders. If we mount database back on Exchange 2003 all our external emails reached to Mail-enabled public folder database.

Anyone help would be highly appreciated.

Thanks & Regards,

Zeeshan butt