Skype for Business Online and Microsoft Teams

Skype for Business Online features and functionality are moving into Microsoft Teams. From a licensing perspective, additional services such as Audio Conferencing and Phone System will continue to be Add-on licences, and from a technical perspective from 1st October, 2018 new Office 365 customers with less than 500 seats will be onboarded to Microsoft  Teams and will have no access to Skype for Business Online.

This is a useful FAQ with lots of information on the whole Skype for Business to Microsoft Teams upgrade topic: http://bit.ly/2pL5Rwz.