Microsoft update the Product Terms site for May 1, 2021 by adding in Microsoft 365 Business Basic, Standard and Premium as eligible prerequisite licences for Audio Conferencing and Phone System: https://bit.ly/2SEiaMG.
Microsoft introduced Microsoft 365 Business Voice in November 2019 for the UK and Canada, and from 1 April 2020 it’s also available in the US. This is a single Add-on licence which includes access to Phone System, Audio Conferencing, and a Domestic Calling Plan, and can be added to an Office 365 plan (Business Essentials, Business Premium, A1, E1, F3, A3, E3) or a Microsoft 365 plan (Business, F3, A3, E3). It’s limited to up to 300 users in an organisation, and the price per month is $20 per user. There’s also an International Calling Plan available for $12 per user per month. Business Voice without a calling plan also launches on 1 April, 2020 in around 70 additional countries.
Microsoft add a new Phone System From SA User SL to the January 2020 Product Terms. Available only in the EA, the usual From SA rules apply with the qualifying licences being Skype for Business Server Plus CALs or a Skype for Business Plus CAL User SL. You’ll find the new licence added to the table on page 69 and the qualifying licences detailed on page 100. Download the Product Terms document here: http://bit.ly/MSproductterms.