Modify all the meeting organizer addresses. If you don't make this happen, the desired destination consumer will begin to see the appointments, but cannot edit them. for i in `cat emails.txt`; do zmprov ma $i zimbraSignatureName “`cat signatures/$i`”; zmprov ma $i zimbraPrefMailSignatureHTML “`cat signatures/$i`”; zmprov ga $i zimbraSignatureId > /tmp/firmaid; https://www.hostscheap.com/zimbra-migration-service