This howto helps you to check/configure Calling in Microsoft Teams.
Make sure you have correct licenses on your Office365 tenant.
E1 E3 E5 Microsoft Phone System License (this one is included in E5) and a Calling plan (domestic or Domestic + International Calling)
Login to the Skype for Business Online Powershell Make sure you have download the SkypeOnlineConnector for Powershell.
Import-Module SkypeOnlineConnector $credential = Get-Credential $session = New-CsOnlineSession -Credential $credential -Verbose Import-PSSession $session Get-Command -Module tmp_mmdx3k5r.