Journaling in Exchange Server or Exchange Online can help your organization respond to legal, regulatory, and organizational compliance requirements by recording all or targeted email messages.
To...
Updated Jan 21, 2025
Version 3.0
Blog Post
Question: You write in scenario 2 (cmt enabled): "As a result, the header X-MS-Exchange-Organization-Processed-By-Journaling is filtered by content filtering before leaving EXO. Therefore, when it reaches On-Premises, the message is journaled again by On-premises if there is a matching rule."
For my understanding: this would lead to double journaling. Is this correct?
Further question: Internal mail (from cloud to onprem) scenario: There you write "Exchange Online journaling rule will process the email sent from Exchange Online to on-premises and add the header X-MS-Exchange-Organization-Processed-By-Journaling. So, Exchange Server will skip journaling for the second time as there won’t be any further changes to the email messages." Doesn't this contradict with the text above?