You have an Office 365 subscription.
Several users report that they fail to connect to Microsoft Skype for Business Online by using the Skype for
Business 2016 client.

You verify that you can connect to Skype for Business Online successfully from your computer.
You need to identify what prevents the users from connecting to Skype for Business Online.
Solution: You use the Microsoft Lync Connectivity Analyzer.
Does this meet the goal? environment, either on-prem or Skype for Business Online, meets the necessary requirements for client connectivity from mobile clients and the Lync Windows Store App. make sure the necessary A records and SRV records are in place. It also checks the proxy configuration for the environment. Lastly, but definitely not least important, it checks on the validity of the SSL certificates that are in place. tools.html

A.
Yes

B.
No

Explanation:

The Microsoft Lync Connectivity Analyzer tool has a very specific purpose. It is meant to determine if a Lync
The tool, in the course of its analysis, tests several components. Among them, it checks public DNS records to
References: http://blog.get-csjosh.com/2015/05/microsoft-remote-connectivity-analyzer-and-associated-