Connection for powershell

1-) $LiveCred = Get-Credential
2-) $Session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri https://ps.outlook.com/powershell/ -Credential $LiveCred -Authentication Basic -AllowRedirection
3-) Import-PSSession $Session
4-) Connect-MsolService

After

Get-MsolUser -ReturnDeletedUsers | Remove-MsolUser -RemoveFromRecycleBin -force