When I try to create an offline address list on a client PC I get a sync problem the only error message I receive is 13:12:38 Microsoft Exchange offline address book 13:12:38 0X80004005 I get the following error message on the server when the server attempts to create the list. OALGen encountered error [0x80040402] while calculating this OAL. This OAL will not be available for client download. Can anyone tell me what I have to do to fix this problem?? Regards, Joe Ledwidge, Systems Manager, MPI - Metal Powders International, Main Road, Tallaght, Dublin 24. Phone: 353-1-4131926 Mobile: 353-87-6290870 email: Joe@xxxxxx