Relevant Products: Exclaimer Cloud - Signatures for Office 365
When performing a message trace in Office 365, you notice a duplicate entry for all messages that have had a signature appended.
This is expected behaviour when using Exclaimer Cloud.
The Office 365 Tracing tool will show an entry for the message that is being routed from your tenancy to the Exclaimer Cloud hosted servers.
The second, apparently duplicated entry is for the message returned from Exclaimer Cloud to the Office 365 tenancy, for delivery.