Do you have name-servers in your config and are you using DNS lookup on the router?
Check out the attached document.
That guide helped out a lot. I already had DNS server's configured but I did not have DNS lookup enabled. There were a couple of other minor changes I made to get it to work. Hopefully between the AOS guide you posted and my example below we can help someone else if they have this type of issue in the future.
no domain-proxy failover
name-server 18.104.22.168 22.214.171.124
event-history priority info
logging forwarding on
logging facility kern
logging forwarding priority-level info
logging email on
logging email priority-level info
logging email max-queue-depth 100
logging email receiver-ip relay.appriver.com port 2525
logging email address-list email@example.com
logging email exception-report address-list firstname.lastname@example.org
logging email ip urlfilter top-websites address-list
logging email ip urlfilter top-websites send-time 00:00:00
logging email sender BB1335@xyz.com
Message was edited by: noor Removed personal contact information.