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- You deploy on-premises servers that're running Exchange Server in a hybrid Exchange and Microsoft 365 environment.
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- You deploy on-premises servers that run Exchange Server in a hybrid Exchange and Microsoft 365 environment.
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- You enable the journal rules or standard journaling on the servers.
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- Your mailbox is located in an on-premises server and you've set up the email address of an on-premises archiving mailbox or a third-party archiving service as the journaling mailbox.
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- You don't create journal rules in Microsoft 365.
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- Your mail exchanger (MX) record points to Microsoft 365.
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- You receive an email message from an Internet source through Microsoft 365.
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In this scenario, the messages sent from the on-premises servers that're running Exchange are journaled as expected. However, the messages that are received from Microsoft 365 or from the Internet aren't journaled.
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In this scenario, the messages that are sent from the on-premises Exchange servers are journaled as expected. However, the messages that are received from Microsoft 365 or from the Internet aren't journaled.
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## Cause
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This issue occurs because the message that either originates from Microsoft 365 or is processed by Microsoft 365 is added by using the following specific internal header:
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This issue occurs because the messages that either originate from Microsoft 365 or processed by Microsoft 365 are added by using the following specific internal header:
This header identifies messages that have been processed by the Exchange Journaling agent. If the header is included in a message, Exchange Server recognizes that the message has already been processed by the Journaling Agent on a previous Hub Transport server. Therefore, it doesn't journal the message again.
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This internal header is used to identify messages that were processed by the Exchange Journaling agent. So when the header is included in a message, Exchange Server recognizes that the message has already been processed by the Journaling Agent on a previous Hub Transport server. Therefore, it doesn't journal the message again.
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## Resolution
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To resolve this issue, navigate to **EAC** > **Compliance Management** > **Journal Rules**, and create the same journal rules that exist on the on-premise servers that are running Exchange.
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To resolve this issue, navigate to **EAC** > **Compliance Management** > **Journal Rules**, and create the same journal rules that exist on the on-premise servers that run Exchange.
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## More information
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In a hybrid environment, there's no replication of journal rules between the on-premises Exchange organization and Microsoft 365. Therefore, when you create a rule in Exchange Server, you have to create a matching rule in Microsoft 365.
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Rules that you create in Microsoft 365 are stored in the cloud, whereas the rules you create in the on-premises organization are stored locally in Active Directory. When you manage rules in a hybrid environment, you have to keep the two sets of rules synchronized by making any changes in both locations.
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Rules that you create in Microsoft 365 are stored in the cloud, whereas the rules you create in the on-premises organization are stored locally in Active Directory. When you manage rules in a hybrid environment, you have to keep the two sets of rules synchronized by making all changes in both locations.
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