If you're using Office 365's Advanced Threat Protection (ATP) feature and you want to exempt KnowBe4's phish domains from being rewritten, below are steps to do so.
Keep in mind, though, if you're not exempting any other URLs from being rewritten, that exempting only KnowBe4's phish domains will provide a red flag for your users to know when they receive simulated phishing emails.
STEP 1: First, submit a support ticket to KnowBe4's support team and request a list of our Phish Domains. Once you receive the Phish Domains, move on to Step 2.
STEP 2: Log into your Office 365 Admin Center and then click on "advanced threats", then "safe links".
STEP 3: Double-click on the name of your Link Policy (ATP Link Policy in this example) and select settings.
STEP 4: You can then add the KnowBe4 Phish Domains to the list under "Do not rewrite the following URLs:".