Hi ,
How are you pingining google ? Can you pls share snapshot ? Are you trying to ping it from dashborad ?
If yes pls let us know the source ip
if you are pinging it from system connected behind MX , Can you do the nslookup for google.com?
Can you ping other destination Ip address/fqdn ?
Is there any rule in MX (Firewall rules) to block ICMP ?