Invalid JWT access token

Question

Hello everyone,

I'm trying to run a PowerShell script in an Azure Automation runbook to connect to Microsoft Graph, but I'm encountering an issue with the connection. Specifically, I keep getting the error: invalid JWT access token.

Can anyone tell me what i am doing wrong?

It works in PowerShell:

Define App Registration details

$tenantId = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"

$clientId = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"

$clientSecret = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" # Client secret value

Define the resource for Azure Management API

$scope = "https://graph.microsoft.com/.default"

$tokenUrl = "https://login.microsoftonline.com/$tenantId/oauth2/v2.0/token"

Get authentication token using client credentials flow

$body = @{

grant_type    = "client_credentials"

client_id     = $clientId

client_secret = $clientSecret

scope         = $scope

}

$response = Invoke-RestMethod -Method Post -Uri $tokenUrl -ContentType "application/x-www-form-urlencoded" -Body $body

$accessToken = $response.access_token

Validate token retrieval

if (-not $accessToken) {

    Write-Host "Failed to obtain access token" -ForegroundColor Red

    exit

}



Write-Host "Access Token obtained successfully" -ForegroundColor Green

# Convert the access token to a SecureString

$secureAccessToken = ConvertTo-SecureString $accessToken -AsPlainText -Force

Connect to Microsoft Graph using the SecureString access token

Connect-MgGraph -AccessToken $secureAccessToken

Answer 1

Hello Flipping ,

I understand you're encountering the "Invalid JWT access token" error when attempting to connect to Microsoft Graph within your Azure Automation runbook.

This is a known issue that arises when using version 2.26.1 of the Microsoft.Graph.Authentication module with PowerShell 7.2.

I have one Azure Automation account where Microsoft Graph modules installed with 2.26.1 version:

When I ran your script in PowerShell 7.2 runbook, I too got same error as below:

To resolve this, you need to revert back its previous version 2.25.0 as a workaround.

In my case, I deleted the existing 2.26.1 Microsoft Graph modules as below:

Now, I ran below PowerShell script in Azure Cloud Shell to install 2.25.0 version Microsoft Graph modules:

# Import Microsoft.Graph.Authentication module

$moduleName = 'Microsoft.Graph.Authentication'

$moduleVersion = '2.25.0'

New-AzAutomationModule -AutomationAccountName 'AutAccName' -ResourceGroupName 'rgName' -Name $moduleName -ContentLinkUri "https://www.powershellgallery.com/api/v2/package/$moduleName/$moduleVersion" -RuntimeVersion '7.2'

# Import Microsoft.Graph.Users module

$moduleName = 'Microsoft.Graph.Users'

$moduleVersion = '2.25.0'

New-AzAutomationModule -AutomationAccountName 'AutAccName' -ResourceGroupName 'rgName' -Name $moduleName -ContentLinkUri "https://www.powershellgallery.com/api/v2/package/$moduleName/$moduleVersion" -RuntimeVersion '7.2'

Response:

Make sure to wait for few minutes until the modules status turns "Available" as below:

When I ran the PowerShell script again after reverting back to 2.25.0 version, I got the response successfully as below:

# Define App Registration details

$tenantId = "tenantId"

$clientId = "appId"

$clientSecret = "secret" # Client secret value

# Define the resource for Azure Management API

$scope = "https://graph.microsoft.com/.default"

$tokenUrl = "https://login.microsoftonline.com/$tenantId/oauth2/v2.0/token"

# Get authentication token using client credentials flow

$body = @{

    grant_type    = "client_credentials"

    client_id     = $clientId

    client_secret = $clientSecret

    scope         = $scope

}

try {

    $response = Invoke-RestMethod -Method Post -Uri $tokenUrl -ContentType "application/x-www-form-urlencoded" -Body $body

    $accessToken = $response.access_token

    # Validate token retrieval

    if (-not $accessToken) {

        Write-Host "Failed to obtain access token" -ForegroundColor Red

        exit

    }

    Write-Host "Access Token obtained successfully" -ForegroundColor Green

    # Convert the access token to a SecureString

    $secureAccessToken = ConvertTo-SecureString $accessToken -AsPlainText -Force

    # Connect to Microsoft Graph using the SecureString access token

    Connect-MgGraph -AccessToken $secureAccessToken

    Write-Host "Connected to Microsoft Graph successfully" -ForegroundColor Green

}

catch {

    Write-Host "Error: $_" -ForegroundColor Red

}

Import-Module Microsoft.Graph.Users

Get-MgUser -Top 10 | Select-Object DisplayName, Id

Response:

To know more regarding this known issue, you can refer this GitHub issue.

Hope this helps!

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Answer 2

Hello Flipping,

I faced the same issue after updating the Microsoft.Graph.Application and Microsoft.Graph.Authentication modules to version 2.26.1. Manually downgrading these modules to version 2.22.0 resolved the issue, allowing me to use the ‘Connect-MgGraph’ command again.