Execute the migration utility to the destination server and export the Delegated Admin data in the source server: zimbra@mail:/opt/backups/zmigrate$ for i in `cat /choose/backups/zmigrate/distributionlist.txt`; do zmprov gdlm $i > /choose/backups/zmigrate/distributionlist_members/$i.txt ;echo "$i"; finished In this case, you migrate your service in the previous server to the new serve... https://www.hostscheap.com/zimbra-migration-service