The 50,000-59,999 port range can be leveraged to include only a single Relay Server in the media path.There are now the following possible media paths.User and User B are at different branch offices behind firewalls), so the media traffic cannot go directly peer to peer and needs to flow via Skype for Business Online For the sake of the example, the direct connection between User A and User B is blocked (e.g.(To understand all the details of their purpose, we recommend watching Troubleshoot media flows in Skype for Business across online, server and hybrid.) To answer this question, it is important to understand first how the 50,000-59,999 ports were used in the first place. Why are these ports not required anymore?
No clients are excluded and there are no specific minimum version required (although we always recommend to run the latest version).
This change applies to all clients supported against Skype for Business Online. Is there a minimum client version required to benefit from the port changes? We are happy to announce that the 50,000-59,999 port range (UDP and TCP) is no longer a requirement for Skype for Business endpoints to communicate with Skype for Business Online.Įarlier this year we talked about making simplification for network connectivity for Skype for Business Online (see blog article here) and we recently updated our guidance and removed the mentioned port range as a requirement: Office 365 URLs and IP address rangesĪll clients need to be able to directly connect to Skype for Business Online on the following destination ports: (the IP addresses and FQDNs can be found in the Office 365 URLs and IP address ranges) Government GCC High click on the respective links. For guidance on Office 365 operated by 21 Vianet, Office 365 Germany, Office 365 U.S. Note: This article applies only to Office 365 Worldwide (including Government Community Cloud).
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