Microsoft previously submitted all the urls and ip ranges for the Office365 platform on docs.microsoft.com. Now there is a new Office365 IP Web Service , HERE
It would be great if this dynamic ip services covered all services in Office365 that can be updated in firewalls and proxies. Unfortunately it does not.
Intune is an amazing service from Microsoft but if you do not white-list the endpoints listed HERE
Features like Bitlocker, x86 custom app deployments, Windows 10 Security Baselines will fail.