Create case task

POST https://graph.microsoft.com/beta/security/caseManagement/cases/{caseId}/tasks
Content-Type: application/json

{
  "@odata.type": "#microsoft.graph.security.caseManagement.task",
  "displayName": "Validate affected devices",
  "status": "new",
  "description": "Review affected devices and collect evidence",
  "assignedTo": "user@contoso.com",
  "closingNotes": "Investigation completed and documented",
  "dueDateTime": "2026-06-29T17:54:43Z",
  "priority": "high",
  "category": "investigate"
}

// Code snippets are only available for the latest version. Current version is 5.x

// Dependencies
using Microsoft.Graph.Beta.Models.Security.CaseManagement;

var requestBody = new TaskObject
{
	OdataType = "#microsoft.graph.security.caseManagement.task",
	DisplayName = "Validate affected devices",
	Status = TaskStatus.New,
	Description = "Review affected devices and collect evidence",
	AssignedTo = "user@contoso.com",
	ClosingNotes = "Investigation completed and documented",
	DueDateTime = DateTimeOffset.Parse("2026-06-29T17:54:43Z"),
	Priority = CaseTaskPriority.High,
	Category = CaseTaskCategory.Investigate,
};

// To initialize your graphClient, see https://learn.microsoft.com/en-us/graph/sdks/create-client?from=snippets&tabs=csharp
var result = await graphClient.Security.CaseManagement.Cases["{case-id}"].Tasks.PostAsync(requestBody);

// Code snippets are only available for the latest major version. Current major version is $v0.*

// Dependencies
import (
	  "context"
	  "time"
	  msgraphsdk "github.com/microsoftgraph/msgraph-beta-sdk-go"
	  graphmodelssecuritycasemanagement "github.com/microsoftgraph/msgraph-beta-sdk-go/models/security/casemanagement"
	  //other-imports
)

requestBody := graphmodelssecuritycasemanagement.NewTask()
displayName := "Validate affected devices"
requestBody.SetDisplayName(&displayName) 
status := graphmodels.NEW_TASKSTATUS 
requestBody.SetStatus(&status) 
description := "Review affected devices and collect evidence"
requestBody.SetDescription(&description) 
assignedTo := "user@contoso.com"
requestBody.SetAssignedTo(&assignedTo) 
closingNotes := "Investigation completed and documented"
requestBody.SetClosingNotes(&closingNotes) 
dueDateTime , err := time.Parse(time.RFC3339, "2026-06-29T17:54:43Z")
requestBody.SetDueDateTime(&dueDateTime) 
priority := graphmodels.HIGH_CASETASKPRIORITY 
requestBody.SetPriority(&priority) 
category := graphmodels.INVESTIGATE_CASETASKCATEGORY 
requestBody.SetCategory(&category) 

// To initialize your graphClient, see https://learn.microsoft.com/en-us/graph/sdks/create-client?from=snippets&tabs=go
tasks, err := graphClient.Security().CaseManagement().Cases().ByCaseId("case-id").Tasks().Post(context.Background(), requestBody, nil)

// Code snippets are only available for the latest version. Current version is 6.x

GraphServiceClient graphClient = new GraphServiceClient(requestAdapter);

com.microsoft.graph.beta.models.security.casemanagement.Task task = new com.microsoft.graph.beta.models.security.casemanagement.Task();
task.setOdataType("#microsoft.graph.security.caseManagement.task");
task.setDisplayName("Validate affected devices");
task.setStatus(com.microsoft.graph.beta.models.security.casemanagement.TaskStatus.New);
task.setDescription("Review affected devices and collect evidence");
task.setAssignedTo("user@contoso.com");
task.setClosingNotes("Investigation completed and documented");
OffsetDateTime dueDateTime = OffsetDateTime.parse("2026-06-29T17:54:43Z");
task.setDueDateTime(dueDateTime);
task.setPriority(com.microsoft.graph.beta.models.security.casemanagement.CaseTaskPriority.High);
task.setCategory(com.microsoft.graph.beta.models.security.casemanagement.CaseTaskCategory.Investigate);
com.microsoft.graph.models.security.casemanagement.Task result = graphClient.security().caseManagement().cases().byCaseId("{case-id}").tasks().post(task);

const options = {
	authProvider,
};

const client = Client.init(options);

const task = {
  '@odata.type': '#microsoft.graph.security.caseManagement.task',
  displayName: 'Validate affected devices',
  status: 'new',
  description: 'Review affected devices and collect evidence',
  assignedTo: 'user@contoso.com',
  closingNotes: 'Investigation completed and documented',
  dueDateTime: '2026-06-29T17:54:43Z',
  priority: 'high',
  category: 'investigate'
};

await client.api('/security/caseManagement/cases/{caseId}/tasks')
	.version('beta')
	.post(task);

<?php
use Microsoft\Graph\Beta\GraphServiceClient;
use Microsoft\Graph\Beta\Generated\Models\Security\CaseManagement\Task;
use Microsoft\Graph\Beta\Generated\Models\Security\CaseManagement\TaskStatus;
use Microsoft\Graph\Beta\Generated\Models\Security\CaseManagement\CaseTaskPriority;
use Microsoft\Graph\Beta\Generated\Models\Security\CaseManagement\CaseTaskCategory;


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

$requestBody = new Task();
$requestBody->setOdataType('#microsoft.graph.security.caseManagement.task');
$requestBody->setDisplayName('Validate affected devices');
$requestBody->setStatus(new TaskStatus('new'));
$requestBody->setDescription('Review affected devices and collect evidence');
$requestBody->setAssignedTo('user@contoso.com');
$requestBody->setClosingNotes('Investigation completed and documented');
$requestBody->setDueDateTime(new \DateTime('2026-06-29T17:54:43Z'));
$requestBody->setPriority(new CaseTaskPriority('high'));
$requestBody->setCategory(new CaseTaskCategory('investigate'));

$result = $graphServiceClient->security()->caseManagement()->cases()->byCaseId('case-id')->tasks()->post($requestBody)->wait();

# Code snippets are only available for the latest version. Current version is 1.x
from msgraph_beta import GraphServiceClient
from msgraph_beta.generated.models.security.case_management.task import Task
from msgraph_beta.generated.models.task_status import TaskStatus
from msgraph_beta.generated.models.case_task_priority import CaseTaskPriority
from msgraph_beta.generated.models.case_task_category import CaseTaskCategory
# To initialize your graph_client, see https://learn.microsoft.com/en-us/graph/sdks/create-client?from=snippets&tabs=python
request_body = Task(
	odata_type = "#microsoft.graph.security.caseManagement.task",
	display_name = "Validate affected devices",
	status = TaskStatus.New,
	description = "Review affected devices and collect evidence",
	assigned_to = "user@contoso.com",
	closing_notes = "Investigation completed and documented",
	due_date_time = "2026-06-29T17:54:43Z",
	priority = CaseTaskPriority.High,
	category = CaseTaskCategory.Investigate,
)

result = await graph_client.security.case_management.cases.by_case_id('case-id').tasks.post(request_body)