GetAllUsersWithToken.ps1

Function GetToken
{
    param(
        [String] $authority = "https://login.microsoftonline.com/<your_tenant>/oauth2/token",
        [String] $clientId = "<client_id>",
        [String] $clientSecret = "<client_secret>",
        [String] $resourceId = "https%3a%2f%2fgraph.windows.net"
    )

    $body = "grant_type=client_credentials&resource=$($resourceId)&client_id=$($clientId)&client_secret=$($clientSecret)"
    $res = Invoke-WebRequest -Uri $authority -Body $body -Method Post
    $authResult = $res.Content | ConvertFrom-Json
    return $authResult.access_token
}

Function GetUsersPage
{
    param(
        [String] $token,
        [String] $nextLink = $null
    )    
    if($nextLink -ne $null -and $nextLink.IndexOf('token=') -gt 0)
    {
        $nextLink = $nextLink.Substring($nextLink.IndexOf('token=') + 6)
    }
    $headers =  @{"Authorization" = "Bearer $($aToken)"; "Content-Type" = "application/json"}
    $usersUri = "https://graph.windows.net/lab09.onmicrosoft.com/users?api-version=1.5&`$top=2&`$skiptoken=$($nextLink)"
    $usersResult = Invoke-WebRequest -Uri $usersUri -Headers $headers
    $users = $usersResult.Content | ConvertFrom-Json
    return $users
}

Function GetUsers
{
    param(
        [String] $token
    )    
    
    $usersPage = GetUsersPage -token $token -nextLink $null
    $usersPage.value
    $nextLink = $usersPage.'odata.nextLink'
    while($nextLink -ne $null)
    {
        $nextPage = GetUsersPage -token $token -nextLink $nextLink
        $nextPage.value
        $nextLink = $nextPage.'odata.nextLink'
    }
}


$aToken = GetToken
$brr = GetUsers -token $aToken
$brr