<?php
use Microsoft\Graph\GraphServiceClient;
use Microsoft\Graph\Generated\Models\UnifiedRoleEligibilityScheduleRequest;
use Microsoft\Graph\Generated\Models\UnifiedRoleScheduleRequestActions;
$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);
$requestBody = new UnifiedRoleEligibilityScheduleRequest();
$requestBody->setAction(new UnifiedRoleScheduleRequestActions('adminRemove'));
$requestBody->setRoleDefinitionId('8424c6f0-a189-499e-bbd0-26c1753c96d4');
$requestBody->setDirectoryScopeId('/');
$requestBody->setPrincipalId('071cc716-8147-4397-a5ba-b2105951cc0b');
$result = $graphServiceClient->roleManagement()->directory()->roleEligibilityScheduleRequests()->post($requestBody)->wait();