Exchange 2013 Skip Filter Rules


i am about to go from NAT to the WAF of our UTM (9.7) to distribute our Exchange (2013).

For that i  went with the Tutorials from which helped me a lot.

But i have still some questions about the filter rules in the firewall profiles which has to be skipped.

Since these rules are just some numbers i would like to clarifiy what i skip when i choose to set these numbers to the skipping list or what is mandatory to skip for an Exchange 2013 Server to work properly.