When using SpamExperts for both your incoming and outgoing email filtering (using the smarthost setup), all external SMTP communication will automatically be archived as part of the domain for which archiving is enabled. However, Microsoft Exchange does not relay internal communication via the outgoing smarthost, therefore internal communication will not be archived by default.
Archiving internal communication is simple, however, and can be accomplished with the Exchange journaling system. The journaling system allows Exchange to automatically send a copy of all internal communication to an external email address.
As long as you've setup the external email address with SpamExperts for archiving, the SpamExperts incoming filter will simply process the message and archives it. You should configure the destination address to which the journaling reports are sent as a whitelisted blackholed recipient. This means for the messages received, no filtering or delivery to an external server takes place. SpamExperts support can help you accomplish this, or you can do so directly via the Software API on our Local Cloud product.
Your Microsoft Exchange administrator will be able to activate journaling for you and ensure a copy of each email is automatically sent to the archived blackholed recipient.