In order to set your outbound Office 365 email to go through E-Mail Security and Spamfilter and be scanned, you will need to set up a connector and a mail rule to redirect all outbound mail to E-Mail Security and Spamfilter.
YOU MUST SET YOUR SPF RECORD BEFORE SETTING UP THE CONNECTOR: include:_spf.centiumsecurity.dk
First, you will need to log-in to your Exchange admin center. From here navigate to mail flow and connectors.
From here you will need to create a new connector and you will need to use the following settings:
On the validate this connector page you should choose an external valid email address where it will test and check if emails can be sent through E-Mail Security and Spamfilter with success.
One the validation is complete go ahead and save your settings.
The next step is to create a rule that will route all messages through our newly created connector.
To create the rule simply navigate to the rules section and press the create new rule button
A new window will open and the first thing to do is to select MORE OPTIONS:
The next step is to populate the fields with the desired settings. Please check the below screenshot for how it should look like:
After completing these steps all outbound emails from your organization should flow through E-Mail Security and Spamfilter.