Can we use Graph API for create an event without sign-in?

Question

My purpose here is to create an event from my website and share the meeting joining link to the users but it's required delegated permission. Is there any alternative way?

<?php
use Microsoft\Graph\GraphServiceClient;
use Microsoft\Graph\Generated\Users\Item\Events\EventsRequestBuilderPostRequestConfiguration;
use Microsoft\Graph\Generated\Models\Event;
use Microsoft\Graph\Generated\Models\ItemBody;
use Microsoft\Graph\Generated\Models\BodyType;
use Microsoft\Graph\Generated\Models\DateTimeTimeZone;
use Microsoft\Graph\Generated\Models\Location;
use Microsoft\Graph\Generated\Models\Attendee;
use Microsoft\Graph\Generated\Models\EmailAddress;
use Microsoft\Graph\Generated\Models\AttendeeType;
use Microsoft\Graph\Generated\Models\OnlineMeetingProviderType;


$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);

$requestBody = new Event();
$requestBody->setSubject('Let\'s go for lunch');
$body = new ItemBody();
$body->setContentType(new BodyType('hTML'));
$body->setContent('Does noon work for you?');
$requestBody->setBody($body);
$start = new DateTimeTimeZone();
$start->setDateTime('2017-04-15T12:00:00');
$start->setTimeZone('Pacific Standard Time');
$requestBody->setStart($start);
$end = new DateTimeTimeZone();
$end->setDateTime('2017-04-15T14:00:00');
$end->setTimeZone('Pacific Standard Time');
$requestBody->setEnd($end);
$location = new Location();
$location->setDisplayName('Harry\'s Bar');
$requestBody->setLocation($location);
$attendeesAttendee1 = new Attendee();
$attendeesAttendee1EmailAddress = new EmailAddress();
$attendeesAttendee1EmailAddress->setAddress('samanthab@contoso.com');
$attendeesAttendee1EmailAddress->setName('Samantha Booth');
$attendeesAttendee1->setEmailAddress($attendeesAttendee1EmailAddress);
$attendeesAttendee1->setType(new AttendeeType('required'));
$attendeesArray []= $attendeesAttendee1;
$requestBody->setAttendees($attendeesArray);

$requestBody->setAllowNewTimeProposals(true);
$requestBody->setIsOnlineMeeting(true);
$requestBody->setOnlineMeetingProvider(new OnlineMeetingProviderType('teamsForBusiness'));
$requestConfiguration = new EventsRequestBuilderPostRequestConfiguration();
$headers = [
	'Prefer' => 'outlook.timezone="Pacific Standard Time"',
];
$requestConfiguration->headers = $headers;


$result = $graphServiceClient->me()->events()->post($requestBody, $requestConfiguration)->wait();

Answer 1

Hi @Sagar Chauhan

Of course, you can use an unattended context, you just need to create a graphClient instance using the client credentials flow.

<?php 

use Microsoft\Graph\GraphServiceClient; 
use Microsoft\Graph\Generated\Users\Item\Events\EventsRequestBuilderPostRequestConfiguration; use Microsoft\Graph\Generated\Models\Event; use Microsoft\Graph\Generated\Models\ItemBody; 
use Microsoft\Graph\Generated\Models\BodyType; 
use Microsoft\Graph\Generated\Models\DateTimeTimeZone; 
use Microsoft\Graph\Generated\Models\Location; 
use Microsoft\Graph\Generated\Models\Attendee; 
use Microsoft\Graph\Generated\Models\EmailAddress; 
use Microsoft\Graph\Generated\Models\AttendeeType;

$scopes = ['https://graph.microsoft.com/.default'];
// Values from app registration
$clientId = 'YOUR_CLIENT_ID';
$tenantId = 'YOUR_TENANT_ID';
$clientSecret = 'YOUR_CLIENT_SECRET';
// Microsoft\Kiota\Authentication\Oauth\ClientCredentialContext
$tokenContext = new ClientCredentialContext(
    $tenantId,
    $clientId,
    $clientSecret);

$graphClient = new GraphServiceClient($tokenContext, $scopes);

$requestBody = new Event();
$requestBody->setSubject('Let\'s go for lunch');
$body = new ItemBody();
$body->setContentType(new BodyType('hTML'));
$body->setContent('Does noon work for you?');
$requestBody->setBody($body);
$start = new DateTimeTimeZone();
$start->setDateTime('2024-07-4T12:00:00');
$start->setTimeZone('Pacific Standard Time');
$requestBody->setStart($start);
$end = new DateTimeTimeZone();
$end->setDateTime('2024-07-4T14:00:00');
$end->setTimeZone('Pacific Standard Time');
$requestBody->setEnd($end);
$location = new Location();
$location->setDisplayName('Harry\'s Bar');
$requestBody->setLocation($location);
$attendeesAttendee1 = new Attendee();
$attendeesAttendee1EmailAddress = new EmailAddress();
$attendeesAttendee1EmailAddress->setAddress('samanthab@contoso.com');
$attendeesAttendee1EmailAddress->setName('Samantha Booth');
$attendeesAttendee1->setEmailAddress($attendeesAttendee1EmailAddress);
$attendeesAttendee1->setType(new AttendeeType('required'));
$attendeesArray []= $attendeesAttendee1;
$requestBody->setAttendees($attendeesArray);

$requestBody->setAllowNewTimeProposals(true); 
$requestBody->setTransactionId('
$requestConfiguration = new EventsRequestBuilderPostRequestConfiguration(); 
$headers = [ 
     'Prefer' => 'outlook.timezone="Pacific Standard Time"', 
]; 
$requestConfiguration->headers = $headers; 


$result = $graphClient->users()->byUserId('user-id')->events()->post($requestBody, 
$requestConfiguration)->wait();

Hope this helps.

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