Action: Create outbound connector that uses MX record to route mail Before data migration to Office 365, we recommend you ...

Action: Create outbound connector that uses MX record to route mail Before data migration to Office 365, we recommend you create an Office 365 outbound connector configured to use MX records. This allows the shared domain to route mail between G Suite and Office 365 mailboxes and mail users during the co-existence portion of the migration phase.