How to get TenantId of Connect-AzureAD from PowerShell Script running in Azure function (Dotnet Core)? - azure

Question

I am trying to get TenantId from Connect-AzureAD that will be returned in the powershell script.
Below is the powershell script:
Install-Module -Name AzureAD
$User = "test#domain.onmicrosoft.com"
$PWord = ConvertTo-SecureString -String "password" -AsPlainText -Force
$Credential = New-Object -TypeName System.Management.Automation.PSCredential -ArgumentList $User, $PWord
$context = Connect-AzureAD -Credential $credential
$tenantId = $context.TenantId.Guid.ToString()
[pscustomobject]#{
user = $tenantId
}
The script works when executed as a PowerShell script alone. But when, I try to run in dotnet core, it seems to be empty.
public static string RunScript()
{
using (Runspace myRunSpace = RunspaceFactory.CreateRunspace())
{
myRunSpace.Open();
using (PowerShell ps = PowerShell.Create())
{
var imagePath = Path.Combine(Environment.CurrentDirectory, #"Resources", "ConnectAzureAD.ps1");
string content = File.ReadAllText(imagePath);
ps.AddScript(content);
var piplineObjs = ps.Invoke();
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.AppendLine(piplineObjs.Count.ToString());
foreach (PSObject obj in piplineObjs)
{
stringBuilder.AppendLine(obj.Properties["user"].Value.ToString());
}
return stringBuilder.ToString();
}
}
}
I get the following error:
System.Private.CoreLib: Exception while executing function: Object reference not set to an instance of an object.
The above function is invoked from a Azure Function. It is using Microsoft.PowerShell.SDK v6.2.7 and System.Management.Automation v6.2.7.
How can I get the tenant Id returned from powershell script in dotnet core?
Or how can I get tenant Id using code with just user's email and password?
Thank you!

Answer 1

You can get tenant id by request this graph api: https://graph.microsoft.com/v1.0/organization
In the response is of the api, we can find the id(which is the tenant id) in it: