Multitenant View bookings for external users

I can only seem to view bookings for users in my group.

When I try create an access token for a user external with a Microsoft account, I can’t access it using “users/[email protected]” but when I change it back to “users/[email protected]” it starts working?

I have enabled multitenant in settings. Is the problem with the token?

How I generate token

 $token = json_decode($guzzle->post($url, [
        'form_params' => [
            'scope' => 'https://graph.microsoft.com/.default',
            'client_id' => '####################',
            'client_secret' => '###################',
            'grant_type' => 'client_credentials',
        ],
    ])->getBody()->getContents());