Hi, I was running exchange 2003 which a source for default OAB. I moved all mailboxes from that server since its a old hardware. Changed default OAB servers to other server in EMC contact And also some public folders running on this server, So I made a replica of that in other server and removed from the old server Right click public folder view system folder in that default address there also replica of other server kept for sync and removed old server. Now if I shutdown old server while shutdown its giving sync error 0x8004010F. Below is the event error and sync error . Any one please help on this issue to remove dependency on OAB to demote the old server.