Perhaps some of your email accounts don’t have mail forwarding. So the above designed data files could be an empty file. Remove those empty information as follows. zmprov ca $i CHANGEme cn "$givenName" displayName "$displayName" givenName "$givenName" zmprov ma $i userPassword "$shadowpass" Zimbra task doesn’t Possess a cross migration or https://www.hostscheap.com/zimbra-migration-service