You configure Skype Directory Search after you upgrade all pools to Skype for Business Server 2015.
Sales and marketing users report that they cannot search Skype consumer contact details.
You need to resolve the issue.
Which outbound connections should you allow?
A . on port TCP/443 from the Front End Servers to any IP address on the internet
B . on port TCP/80 from the Edge Server to any IP address on the internet
C . on port TCP/4443 from the Front End Servers to any IP address on the internet
D . on port TCP/443 from the Edge Server to any IP address on the internet
Answer: D
Explanation:
https://ucmart.uk/tag/skype-directory-search/