Emails with missing bodies during migration

An interesting quirk we have seen while migrating customers across to Exchange Online – results in an email with no body being received by the recipient.
The customer situation:
– domain is added and validated to Exchange Online
– Type is set to ‘Authoritative’
– Inbound is not yet enabled
– customer has user accounts set up in Exchange Online, but is not yet using them

If anyone outside the organisation is using Exchange Online as well, they will find that when sending an the said customer – the body of the message disappears.

We find this to occur when we (using Exchange Online) send emails to customers when we are performing staged migrations.
If you’re trying to send an email to the customer, a workaround can be to attach your original email as an item to a new email to the customer – as attachments still come through.

Hopefully if you’ve seen these emails without bodies – it’s not a ghost but a common issue. 🙂