The following IP addresses for the AssetCloud & InventoryCloud servers can be entered into Allow Lists to allow email relaying (e.g. into an Exchange Server), and ADFS communication for users enabling that.

54.161.218.3
52.45.71.160
52.200.144.49

AWS SES (Simple Email Service) IP addresses:
199.255.192.0/22
199.127.232.0/22
54.240.0.0/18

You can query for the SES addresses using:
nslookup -type=TXT amazonses.com

This article will be updated in the future if needed.