Firewall settings If you have firewalls on your Intranet and you need to open ports between the %BRAND_AAD_CONNECT_SHORT% ...

Firewall settings  If you have firewalls on your Intranet and you need to open ports between the %BRAND_AAD_CONNECT_SHORT% servers and your domain controllers, then see %BRAND_AAD_CONNECT_SHORT% Ports for more information. If your proxy or firewall limit which URLs can be accessed, then the URLs documented in %BRAND_OFFICE_365_SHORT% URLs and IP address ranges  must be opened.