All, We are in the process of migrating from Exchange 5.5 to Exchange 2003. We were able to successfully move mailboxes between servers and were able to successfully populate the PF Highearchy by using PFMigrate script. The pub.edb on Exchange 5.5 is about 28 GB and it was replicating to Exchange 2003 happily till Pub1.edb on Exchange 2003 server was 14 GB and then we started seeing errors by turning Diag loggin on MSExchangeIS-Public Event Type: Error Event Source: MSExchangeIS Public Store Event Category: Replication Errors Event ID: 3093 Description: Error -2147221233 reading property 0x67480014 on object type tbtOwningFolders from database "First Storage Group\Public Folder Store Computer_Name We restated the Exchange 2003 & Exchange 55 server and still no luck... We followed KB 812294.. but do not find Replication key there... Also under HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeIS\ExchangeServerName\<<PublicUniqueID>> was deleted and IS was restarted.. still no luck... We are really running short of ideas and are looking forward to help from you all. Thanks in advance. Rahul