Hi, I have the scenario explained below from a customer. Old setup: Front End: OS/SP/Exchange Ver.: Win2000/ SP3 / Exchange 2000 Back End: OS/SP/Exchange Ver.: Win2000/ SP3 / Exchange 2000 Upgraded the front end Exchange 2000 to Exchange 2003 first, then back end Exchange to Exchange 2003 and then backend OS to Win 2003. Current Configuration: Front End: OS/SP/Exchange Ver.: Win2000/ SP4 / Exchange 2003 Back End: OS/SP/Exchange Ver.: Win2003/ n/a/ Exchange 2003 Problem Description: After the Upgrade customer is not able to replicate the public folders between the Public Folders. Any feed back will be really appreciated. Akhil Hangal Technical Service Coordinator Microsoft Global Partner Support Phone: (800) 936-2200 mailto:uspstsc@xxxxxxxxxxxxx <mailto:uspstsc@xxxxxxxxxxxxx> Microsoft Global Partner Support TSCs are available from 6 AM - 6 PM PST Monday - Friday. We welcome your comments and suggestions. Please send feedback to my manager, Lalitha S, by sending mail to lalithas@xxxxxxxxxxxxx Akhil Hangal MCSE,MCSA. Technical Service Coordinator Microsoft Global Partner Support Phone: (800) 936-2200 mailto:uspstsc@xxxxxxxxxxxxx <mailto:uspstsc@xxxxxxxxxxxxx> Microsoft Global Partner Support TSCs are available from 6 AM - 6 PM PST Monday - Friday. We welcome your comments and suggestions. Please send feedback to my manager, Lalitha S, by sending mail to lalithas@xxxxxxxxxxxxx <mailto:lalithas@xxxxxxxxxxxxx>