Get SPO sites using MS Graph API powershell not working

Question

I'm trying to get all SharePoint Online sites' name and url via PowerShell using MS Graph API, but it's not seem to be working. That's all I get from the request:

@{@odata.context=https://graph.microsoft.com/v1.0/$metadata#sites; value=System.Object[]}

The application I use have all the needed Application type API permissions (Sites.Read, Sites.ReadWrite.All) with admin consent.

Do you have any idea why my script not working?

The code:

$TenantID = 'xxxxxxxxx.ONMICROSOFT.COM'
$ApplicationId = "xxxxx-xxxxxx-xxxx-xxxx"
$ApplicationSecret = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"

$body = @{
    'resource'      = 'https://graph.microsoft.com'
    'client_id'     = $ApplicationId
    'client_secret' = $ApplicationSecret
    'grant_type'    = "client_credentials"
    'scope'         = "openid"
}

$ClientToken = Invoke-RestMethod -Method post -Uri "https://login.microsoftonline.com/$($tenantid)/oauth2/token" -Body $body -ErrorAction Stop
$headers = @{ "Authorization" = "Bearer $($ClientToken.access_token)" }


$AllSites = Invoke-RestMethod -Uri "https://graph.microsoft.com/v1.0/sites?search=*" -Headers $headers -Method Get 

Write-Host $AllSites

I've also tried these URIs:

https://graph.microsoft.com/v1.0/sites?search=* https://graph.microsoft.com/v1.0/sites https://graph.microsoft.com/v1.0/sites$select=siteCollection,webUrl&$filter=siteCollection/root%20ne%20null

Sage Pourpre · Accepted Answer · 2022-09-21 17:08:31Z

The Write-Host cmdlet's primary purpose is to produce for-(host)-display-only output, such as printing colored text like when prompting the user for input in conjunction with Read-Host. Write-Host uses the ToString() method to write the output. By contrast, to output data to the pipeline, use Write-Output or implicit output.

reference

This mean that your output is transformed for display purposes. Where you see System.Object[], there is actually data in there just waiting for you.

Based on your current results, your query look good. Just do not use Write-Host and dig into the object as needed. To get the site names, just use $AllSites.Value.Name

$AllSites = Invoke-RestMethod -Uri "https://graph.microsoft.com/v1.0/sites?search=*" -Headers $headers -Method Get

# Return site names
$AllSites.Value.Name

If you need to get additional information from each return you can loop into them, like this to do whatever you need. Here is a custom display of the site name along with an arbitrary index and the associated URL


$index = 0
# Will display results like
# 0: SiteName - www.contoso.sharepoint.com/SiteUrl
foreach ($Site in $AllSites.Value) {
    Write-Host "$($index.ToString().PadRight(3,' ')): $($Site.Name) - " -NoNewline 
    Write-Host $site.webUrl -ForegroundColor Cyan
    $index += 1
}

Also, here is an additional reference when working with Azure Graph API that will confirm your requests are working as expected: https://developer.microsoft.com/en-us/graph/graph-explorer

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