Matt Soseman posted an overview on how to configure Toll-Free Numbers for Dial-In Conferencing in Office365.
What is Cloud PSTN Conferencing?
Cloud PSTN Conferencing is a feature in Office365 E5 offering the capability to join a Skype for Business meeting using a traditional dial-in telephone number as an alternative to using the Skype for Business client on a PC or smartphone. This will allow the meeting attendee to participate in the audio only portion of the meeting.
This can also be used independently of Skype for Business as a traditional conference bridge, a useful scenario when the full client experience is not desired or inaccessible.
What’s Required?
To enable, you must have:
- An Office365 tenant
- A E5 subscription (either trial or purchased)
- At least one user account located in the tenant
Assign the user the full Office365 Enterprise E5 license, or the Skype for Business PSTN Conferencing license.
For access to more information check it out here: