The A/V Edge Server in your environment will need to be configured liked this. If you have an on-premises deployment of Skype for Business, the requirements for your Edge Server to communicate to Skype for Business Online remain unchanged (and also for any Federation scenarios including Skype for Business on-premises). This change only applies to users who are homed in Skype for Business Online. What does this change for hybrid between Skype for Business Server and Skype for Business Online? If you have the ports open today, it makes sense to leave them open. However in our data analysis and pilot deployments with some customers these differences did not show significance. Having the 50,000-59,999 port range open can still have (some) benefits when it comes to call setup times and under some circumstances on call quality. Our organization has these ports open, should we close them?
![office 365 skype for business server settings office 365 skype for business server settings](https://www.c21video.com/images/-3q3mhu.png)
![office 365 skype for business server settings office 365 skype for business server settings](https://i0.wp.com/blogs.perficient.com/files/2017/08/Exch-IMSignIn.png)
While logic tells us that usually we want to avoid additional hops under all circumstances, the analysis on call quality data has shown us, that this additional hop does not significantly affect call quality - since both these Relay Servers are homed on the Microsoft Network, all traffic between the Relay Servers is sent over a highly reliable pipe designed for real-time communication.
![office 365 skype for business server settings office 365 skype for business server settings](https://www.practical365.com/wp-content/uploads/2018/12/Pic-4-1.png)
![office 365 skype for business server settings office 365 skype for business server settings](https://www.partitionwizard.com/images/uploads/articles/2019/09/uninstall-skype-for-business/uninstall-skype-for-business-thumbnail.png)
Note: This article applies only to Office 365 Worldwide (including Government Community Cloud).