Skype for Business Online for Office 365 Firewall Requirements

The following are the requirements of Skype for Business Online for Office 365, note this information can change as the service evolves. This is from the clients machine to Office 365 Firewall Ports Port Destination Protocol Client Usage Direction 443 TCP SIP Signalling Outbound 443 TCP Audio, Video, Application sharing sessions and Web Conferencing Outbound 3478 … More Skype for Business Online for Office 365 Firewall Requirements