On Office 365 with Exchange, create the Send connector that sends the journal reports to the ContentStore Mail Server (SMTP).
The domain name must be a non-existent domain. You must use the same domain for the remote domain, the mail contact, the Send connector, and the journal rules.
Disclaimer: This procedure is performed using the Microsoft Exchange Command Center (EAC) Web application. The EAC application is subject to change without notice. Consult the Microsoft documentation before you perform this procedure. For example, see the Microsoft TechNet article: "Exchange admin center in Exchange Online", https://technet.microsoft.com/en-us/library/jj200743(v=exchg.150).aspx
Before You Begin
From the Exchange Command Center, click Mail Flow.
Click Add (+).
On the Select your mail flow scenario page, do the following:
From the From list, select Office 365.
From the To list, select Partner Organization.
On the first New connector page, do the following:
In the Name box, type Journal.
In the Description box, type a description for the connector.
Select the Turn it on check box to activate the connector.
On the second New connector page, do the following:
Select Only when email messages are sent to these domains.
Click Add (+), and then type the mail contact domain address.
On the third New connector page, do the following:
Select Route email through these smart hosts.
Click Add (+), and then type the IP addresses for the smart hosts.
These must be public IP addresses.
Note: Port 25 must be open.
On the fourth New connector page, do the following:
Select the Always use Transport Layer Security (TLS) to secure the connection check box.
Select Any digital certificate, including self-signed certificates.
On the fifth New connector page, review your settings, and then click Next.
On the sixth New connector page, do the following:
Click Add (+), and then type the email address of the mail contact.