Skype for Business (SfB) was not renamed Teams, the two products are completely unrelated, beyond Teams being a successor product to SfB. Although there was a

Skype for Business (SfB) was not renamed Teams, the two products are completely unrelated, beyond Teams being a successor product to SfB. Although there was a little bit of integration between SfB and Skype, (and between SfB and Teams as well) - so could communicate from one to the other. Although Skype for Business Online was phased out in favour of Teams, the on-prem version still exists, probably for those customers that cannot/will not use Teams for regulatory/compliance reasons, and no end of life date has been announced for the on-prem version yet.