on your lab server with full bkp run:
/opt/zimbra/bin/zmmailbox -z -m
user@domain.com getRestURL “//?fmt=tgz” > /tmp/account.tgz
then copy with scp.. to your production server and run :
/opt/zimbra/bin/zmmailbox -z -m
user@domain.com postRestURL “//?fmt=tgz&resolve=modify” /tmp/account.tgz