I am having exchnage server 2003 with SP2. Most of the outlook (2003/22007) client complaint that they can not see modified user details like mobile no, department, modified display name in their outlook if running in cache mode. We did manually to 'send/receive' and getting synchonisation error. error message " Task 'user name' reported error (0x8004010F). The operation failed. An error cannot be found.' offline address book is not getting updated from online address book. Regular interval is schedule daily mornign from 5:00AM.