I have 2 connections comming in - load balancing. I'm looking for a way to take an internal IP for a exchange server and make all out going traffic to use a specfic wan (wan 1). Maybe i over looked something but i'm not seeing it.
In Security Appliance --> Traffic Shaping --> Flow preferences you can add an internet traffic rule with the source of your mail server and destination of either upstream server or any and destination port of 25 or 587 or whatever and tell it to use WAN 1
Edit: Here's the help for flow preferences: https://documentation.meraki.com/MX-Z/Firewall_and_Traffic_Shaping/MX_Load_Balancing_and_Flow_Prefer...
One gotcha, the flow preferences only work for TCP, UDP or both. They don't work for ICMP and possibly not other protocols.