We were presently using zcs 5.0.13 and now we are migrating to zcs 7 and i have setup of zimbra 7 with ubuntu 10.04 (new server) and zcs 5.0.13 on Rhel 4.7(old server). As there is no direct migration is possible i have pulled mail accounts from old server to new server by using LDAP but user mails have not been moved so i did it manually by using export and import by web interface. but when i do the same for an outlook user then all the mails get downloaded again so now there are 2 copies of mails by using new server every thing is fine. But how to stop replica of mails in outlook by using new server.