Meraki Mx84 preferences

[Soro1]

I am configuring Meraki MX84 security appliance, i want the email and microsoft crm traffic to go through WAN-2 and the rest of the traffic through WAN-1. Our email service is on microsoft exchange online, When i use the command nslookup outlook.office365.com, i got the addresses below.

Addresses:  2603:1006:2::2

          2603:1006:2:b::2

          2603:1006:2:1::2

          52.98.18.50

          52.98.18.34

          52.98.18.18

Aliases:  outlook.office365.com

          outlook.ms-acdc.office.com

On the MX flow preferences, what should be the subnet mask of these addresses?our network is using IPv4. 

Last question, is there a way that i can direct traffic to destination hostname not ip address?

[Prashant_India]

You can use FQDN feature of MX to route O365 traffic by using local ILL 

[jdsilva]

I'm not clear on what @Prashant_India is referring to... Perhaps you can provide more info on that?

@Soro1 the Internet Flow Preferences only take IP addresses, so no you can't do this with FQDNs unfortunately. If you want to use single IP addresses for destinations use a /32 mask.