Open Windows PowerShell as an administrator (use Run as administrator) on any machine which has Internet connection.
Run the command below, and enter your Office 365 admin account credentials.
$credential = Get-Credential

Run the script below to import the Skype for Business PowerShell Module:
Import-Module SkypeOnlineConnector
Run the command below to create a new session
$session = New-CsOnlineSession -Credential $credential -Verbose
Finally, import the new session into the Windows PowerShell console.
Import-PSSession $session
