Some of the Skype for Business Online services are renamed: PSTN Calling is now Calling Plan, PSTN Conferencing is Audio Conferencing, Cloud PBX is Phone System, and PSTN Consumption is now Communication Credits.

This is a useful page to find out more about these services and their licensing: http://bit.ly/2y71dyv, and page 6 of the October 2017 Product Terms summarises the changes.