$Username = 'xxxx@xxx.com'
$Password = ConvertTo-SecureString -AsPlainText 'xxxx' -Force
$Livecred = New-Object System.Management.Automation.PSCredential $Username, $Password
$Session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri https://outlook.office365.com/powershell-liveid/ -Credential $Livecred -Authentication Basic -AllowRedirection
INVOKE-COMMAND –Session $Session –scriptblock {Get-DistributionGroup}

PowerShell psExec = PowerShell.Create();
    Collection<PSObject> results;
    Collection<ErrorRecord> errors;
    psExec.AddScript(scriptText);
    results = psExec.Invoke();
    if (results != null && results.Count != 0){
     foreach (PSObject obj in results)
     {
      //this is where it retrieve the info from distribution group
      }
    }

PowerShell psExec = PowerShell.Create();
    Collection<PSObject> results;
    Collection<ErrorRecord> errors;
    psExec.AddScript(scriptText);
    results = psExec.Invoke();
    if (results != null && results.Count != 0){
     foreach (PSObject obj in results)
     {
      //this is where it retrieve the info from distribution group
      }
    }

Connecting to remote server outlook.office365.com failed with the following error message : Access is denied. For more information, see the about_Remote_Troubleshooting Help topic.rnCannot validate argument on parameter u0027Sessionu0027. The argument is null or empty. Provide an argument that is not null or empty, and then try the command again.rn"