Hi @Dias DT That is the anticipated habits you described earlier mentioned. Should you issue the MX document to O365, this aids make sure that email is sent to your Microsoft 365 or Office 365 mailboxes. Transferring the MX file may even Enable you turn off your previous email process https://free-mail-zimbra-migratio88887.wikigop.com/659253/the_fact_about_free_webmail_zimbra_migration_that_no_one_is_suggesting