You are a network administrator for a company that uses Microsoft Lync.
You need to ensure that users can access conferencing from mobile phones even if the phones do
not support the Lync mobile client.
What should you set up?

A.
Web Conferencing tools

B.
dial-in conferencing

C.
multi-party audio and video

D.
Skype

Explanation:
With dial-in conferencing, you can add telephone access to Lync Online meetings for users who can’t
get to a computer. Here’s how to set it up:
1. Contact an audio conferencing provider for dial-in numbers, conference codes, and personal
identification numbers (PIN).
2. Add, change, or remove dial-in conferencing settingsfor meeting organizers and conference call
leaders.
Set up dial-in conferencing so people can join meetings by phone [Small Business]
https://support.office.com/en-us/article/Set-up-dial-in-conferencing-so-people-can-join-meetingsby-phone-Small-Business-476d751e-2094-46ed-8c46-4a7a18217953