We have just implemented ConnectWise as our MSP system and are in the process of implementing Teams/CloudPBX. There is an option to 'click to dial' but it defaults to Skype for Business. Default programs for protocols are shown in the attachments, but LYNC protocols cannot be changed from Skype for Business to Teams - the other option is to look for an app in the Appstore.
ConnectWise Support indicates any 'click to dial' solution required TAPI 3.x. I know Teams is not TAPI 3.x. Are we stuck on this matter until Microsoft decides to help us out?