How to configure Email Protection in MTA mode with office 365

Question

IN email protection - relay settings - Host based replay, no option to put the FQDN for **** .mailprotection-outlook.com . Looks like need ip addresses. This is not static ip address. What would you use for ip address network, range? 
 Thanks.

Breakingcustom · Answer

Alan, 
 
 Take a look at this KB: https://community.sophos.com/kb/en-US/132416 
 You need to add the networks listed for EOP: https://docs.microsoft.com/en-us/office365/SecurityCompliance/eop/exchange-online-protection-ip-addresses 
 This the same Alan that lives in Dubuque? 
 
 - Chris Conlan 
 Sophos XG Certified Architect 
 Sophos UTM Certified Engineer