You deploy Office 365.

You must implement Microsoft Skype for Business Online for all users. including audio and video for all desktop clients. All company desktop machines reside behind a company firewall.

You need configure the firewall to allow clients to use Skype for Business Online.

Which three outbound ports or port ranges should you open? Each correct answer presents part of the solution.

NOTE:

Each correct selection is worth one point.

A. TCP 80

B. TCP 5061

C. UDP 3478

D. TCP 443

E. TCP and UDP 50000-59999

Explanation:

References: https://support.microsoft.com/en-za/help/2409256/you-can-t-connect-to-skype-for-business-online–or-certain-features-do