How to fix issue for Outlook calendar Sync with PHP?

Question

When using Microsoft Graph Explorer, and making request, it’s returning the events data correctly.

• But when in code we generate access token, it’s not able to make request and there is some permission issue,
• So, the access token we are generating through code as per the official Microsoft documentation, isn’t having the required permission, even though we are specifying the required permission array as scope when making request for access token.
  

Below is the code, I am using,
public function authorize() {

$auth_url = $this->Microsoft_calendar_model->createAuthUrl();

redirect($auth_url);

}

public function createAuthUrl() {

$authorize_url = "{$this->auth_base_url}/{$this->tenant_id}/oauth2/v2.0/authorize";

$queryParams = http_build_query([

'client_id' => $this->client_id,

'response_type' => 'code',

'redirect_uri' => $this->redirect_uri,

'scope' => implode(' ', $this->scopes),

'response_mode' => 'query',

'prompt' => 'consent'

]);

return "{$authorize_url}?{$queryParams}";

}

// User is getting prompt for permission consent and even though accepting all permissions isn't working

public function callback() {

$code = $this->input->get('code');  // I am getting the code here.

$access_token = $this->microsoft_calendar_model->fetchAccessTokenWithAuthCode($code);

}

// Issue occurs in the below function

public function fetchAccessTokenWithAuthCode($code) {

$token_url = "{$this->auth_base_url}/{$this->tenant_id}/oauth2/v2.0/token";

$client = new \GuzzleHttp\Client();

$response = $client->post($token_url, [

'headers' => [

'Content-Type' => 'application/x-www-form-urlencoded'

],

'form_params' => [

'client_id' => $this->client_id,

'client_secret' => $this->client_secret_value,

'redirect_uri' => $this->redirect_uri,

'code' => $code,

'grant_type' => 'authorization_code',

'scope' => 'offline_access Calendars.ReadWrite'

]

]);

$tokenData = json_decode($response->getBody()->getContents(), true);

$tokenContext = new AuthorizationCodeContext(

$this->tenant_id,

$this->client_id,

$this->client_secret_value,

$tokenData['access_token'],

$this->redirect_uri

);

$graphClient = new GraphServiceClient($tokenContext, $this->scopes);

$events = $graphClient->me()->calendars()->byCalendarId('primary')->events()->get()->wait();

pre($events);

}
What I'm doing wrong, I can't figure it out anywhere?

Answer 1

Hi @Harsh Prajapati

Using guest user to get/create events is not supported because guest user does not have an EXO mailbox available in the current tenant, it can only get/create events as its identity in the home tenant.

Try configuring the calling app as a multi-tenant app, then change /{tenant_id} to /common and log in.

Hope this helps.

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