Office 365 Enterprise E5

Important

Skype for Business Online will be retired on July 31, 2021. If you haven't upgraded your Skype for Business Online users to Microsoft Teams before that date, they will be automatically scheduled for an assisted upgrade. If you want to upgrade your organization to Teams yourself, we strongly recommend that you begin planning your upgrade path today. Remember that a successful upgrade aligns technical and user readiness, so be sure to leverage our upgrade guidance as you navigate your journey to Teams.

The Office 365 Enterprise E5 plan includes most Skype for Business features. There are just a few additional options.

To add this feature
Here's what you need to buy
Audio Conferencing is included!
Once you buy the license, Microsoft will be your audio conferencing provider.
Toll-free numbers for dial-in access to your meetings, and the ability to dial out from a meeting to add someone by calling any telephone number in the world.
Communications Credits
Phone System and voicemail is included!
Calling Plans: buy a Calling Plan from Office 365.
Or, use the telephone service from your existing provider.