1. Select Mail flow > Rules from the left-hand side menu.
2. Click on the Black Pearl Mail rule.
3. Click Edit rule conditions.
4. Scroll down to Except if and locate the existing The Sender... domain is exception.
5. To the right of The sender domain is onmicrosoft.com, there is a little pencil icon. Click on the pencil icon to edit the existing exception.
6. We are going to be adding an additional domain to this list. In the box, enter microsoft.com and click Add.
7. Make sure the microsoft.com domain appears in the list and click Save.
8. You should now see 2 x domains in the exclusion. Click Save.