How to stop processing spam rules for between two users

Step 1: Sign into Office 365 using the URL http://portal.office.com

Step 2: Click on Admin and navigate to Exchange admin center

Step 3: Scroll down and click on More Features.

Step 4: Click Open under Transport Rules.

Step 5: Click on the Mail Flow tab.

Step 6: Click on the Add icon on the top-left.

Step 7: Select the option Bypass spam filtering

Step 8: Enter a name and select The message is between members of these groups in the Apply the rule if area and then select the two users.

Step 9: Click Save.