Unable to locate ItemId following successful creation of Exchange item

Platforms

Microsoft Exchange or Microsoft 365 as a destination.

Explained

CloudM Migrate generates this exception when an email is created in the destination but the response for the creation request doesn't contain the expected "ItemId". Basically the mail has been imported already. We will generally see this skip in the migration trace following the exception: "Message with ID: <...> already processed this run, skipping".