To set up a mail flow rule to bypass ATP link processing:

1. Create a new mail flow rule in your Exchange/Office Admin center.
2. Give the rule a name such as “Bypass ATP Links”.
3. Click More options….
4. From the Apply this rule if…. drop-down menu, select The senders then
select IP address is in any of these ranges or exactly matches.
5. Enter the IP address.
6. From the Do the following… drop-down menu, select Modify the
message properties… and then set a message header.

        • Click the first *Enter text… link and set the message header to:

                • X-MS-Exchange-Organization-SkipSafeLinksProcessing
 
      • Click the second *Enter text… link and set the value to:

                • 1
7. Click Save.