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We currently have a hybrid configuration with two separate on premise domains in hybrid with a single o365 tenant. However, we use Mimecast for Journaling and have separate Mimecast entities for both .domainA.com and .domainB.com.
.domainA.com is the default domain in o365 and when the system mailbox sends the journal it sends through the configured connector as .domainA.com. This is fine for .domainA.com journaling but doesn't work when journaling for .domainB.com users as the .domainB.com as it sees it as an open relay.
Without having separating our o365 tenant or combining our Mimecast entities, is there a way to make this work?
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Hello, @Stuart Moon
It's been a long time since I've heard from you, have you solved your problem yet? Did his previous reply help you？ If it was useful, you can mark it as an answer. Thank you for your understanding and support.
Hi Stuart,
Only one journal connector is required on the Mimecast side, and both the on-premises server and Office 365 can be configured to send journal messages to the same email address (e.g., ******@journal.domainA.com and ******@journal.domainB.com). This approach allows you to handle journaling for both domains without separating your Office 365 tenant or combining Mimecast entities.
To deploy instructions, you can get tutorials from Mimecast website.