Lessen the TTL of MX documents of the domain to 500 seconds . So that you could very easily change the domain’s IP just after migration. Make sure you remember to program the migration job on non peek hours. It is a tailored handbook means of server migration. However, if https://zimbramigration77777.wikiitemization.com/4240331/an_unbiased_view_of_free_webmail_zimbra_migration