Relevant Product: Exclaimer Cloud - Signatures for Office 365
Scenario
The Signature Rules Tester shows that a signature is applied, but signatures are not applied when live emails are sent.
Reason
This, most likely, is due to an external issue, where the email has not been routed to Exclaimer Cloud correctly.
Resolution
Please refer to the following article for guidance in resolving this issue: A signature is not applied for one or more users