4) Under Apply the Rule if… select The sender... and then select is external/internal.
5) In the popup window, select Inside the organization, and click Ok.
6) Under Do the following...click the dropdown and select Redirect the message to... then select the following connector.
7) Select Black Pearl Mail Outbound, click OK.
8) Under Except if... click on add exception.
9) In the drop-down select The message properties... and then includes the message type.
10) In the dropdown, select Calendaring, and then click Ok.
11) Under Except if... click on add exception.
12) In the drop-down select A message header… and then select matches these text patterns.
13) Click on Enter text...
14) Enter X-BP and click OK.
15) Click on Enter text patterns...
16) Enter ^*$
Then click on the + to add it.
Then click OK. Your value should be listed below.
17) Under Except if... click on add exception.
18) Under the dropdown select The Sender...
19) Then select domain is.
20) Enter onmicrosoft.com
Then click + to add it.
Click OK. Your value should now be listed below:
21) Scroll down to Match sender address in message: and change to Envelope. Click Save.
22) Next, edit the Black Pearl Mail rule to set the priority. Select the Black Pearl Mail rule and edit on the edit icon.
23) Under Priority set the value to 0 and then click Save.
That completes the settings needed in O365. You are now configured to route with Black Pearl Mail. Please note these settings can take up to an hour to complete.