Create case attachment

Namespace: microsoft.graph.security.caseManagement

Important

APIs under the /beta version in Microsoft Graph are subject to change. Use of these APIs in production applications is not supported. To determine whether an API is available in v1.0, use the Version selector.

Create attachment metadata for a case. This method doesn't upload the file content. After creating the attachment, use Upload attachment content.

This API is available in the following national cloud deployments.

Global service	US Government L4	US Government L5 (DOD)	China operated by 21Vianet
✅	❌	❌	❌

Permissions

Choose the permission or permissions marked as least privileged for this API. Use a higher privileged permission or permissions only if your app requires it. For details about delegated and application permissions, see Permission types. To learn more about these permissions, see the permissions reference.

Permission type	Least privileged permissions	Higher privileged permissions
Delegated (work or school account)	CaseManagement.ReadWrite.All	Not available.
Delegated (personal Microsoft account)	Not supported.	Not supported.
Application	CaseManagement.ReadWrite.All	Not available.

Important

For delegated access using work or school accounts, the signed-in user must be assigned a supported Microsoft Entra role or a custom role that grants the permissions required for this operation. This API supports the following built-in roles:

Global Reader
Security Reader
Security Operator
Security Administrator

HTTP request

POST /security/caseManagement/cases/{caseId}/attachments

Request headers

Name	Description
Authorization	Bearer {token}. Required. Learn more about authentication and authorization.
Content-Type	application/json. Required.

Request body

In the request body, supply a JSON representation of the microsoft.graph.security.caseManagement.attachment object.

You can specify the following properties when creating an attachment.

Property	Type	Description
description	String	The description of the resource. Optional.
displayName	String	The display name of the attachment. The value must be unique among attachments in the same case; creating another attachment with the same display name isn't allowed. Required.
fileExtension	String	The file extension of the attachment. The service normalizes the value to include a leading period. Optional.
fileSize	Int64	The size of the attachment in bytes. The maximum file size is 100 MB. Required.

The origin and scanResult properties are service controlled and can't be supplied.

Response

If successful, this method returns a 201 Created response code and a microsoft.graph.security.caseManagement.attachment object in the response body.

Examples

Request

The following example shows a request.

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

{
  "@odata.type": "#microsoft.graph.security.caseManagement.attachment",
  "displayName": "Case MS-001 Attachment",
  "description": "Screenshot of suspicious sign-in activity",
  "fileSize": 1000,
  "fileExtension": "jpeg"
}


// 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 Attachment
{
	OdataType = "#microsoft.graph.security.caseManagement.attachment",
	DisplayName = "Case MS-001 Attachment",
	Description = "Screenshot of suspicious sign-in activity",
	FileSize = 1000L,
	FileExtension = "jpeg",
	ScanResult = AttachmentScanResult.NoThreatsFound,
	Origin = new AttachmentOrigin
	{
		OdataType = "microsoft.graph.security.caseManagement.attachmentOrigin",
		ResourceId = "987757fb-6ef4-1061-17e7-9de0d088e1dd",
		ResourceType = AttachmentOriginType.Case,
	},
};

// 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}"].Attachments.PostAsync(requestBody);

Important

Microsoft Graph SDKs use the v1.0 version of the API by default, and do not support all the types, properties, and APIs available in the beta version. For details about accessing the beta API with the SDK, see Use the Microsoft Graph SDKs with the beta API.

For details about how to add the SDK to your project and create an authProvider instance, see the SDK documentation.



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

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

requestBody := graphmodelssecuritycasemanagement.NewAttachment()
displayName := "Case MS-001 Attachment"
requestBody.SetDisplayName(&displayName) 
description := "Screenshot of suspicious sign-in activity"
requestBody.SetDescription(&description) 
fileSize := int64(1000)
requestBody.SetFileSize(&fileSize) 
fileExtension := "jpeg"
requestBody.SetFileExtension(&fileExtension) 
scanResult := graphmodels.NOTHREATSFOUND_ATTACHMENTSCANRESULT 
requestBody.SetScanResult(&scanResult) 
origin := graphmodelssecuritycasemanagement.NewAttachmentOrigin()
resourceId := "987757fb-6ef4-1061-17e7-9de0d088e1dd"
origin.SetResourceId(&resourceId) 
resourceType := graphmodels.CASE_ATTACHMENTORIGINTYPE 
origin.SetResourceType(&resourceType) 
requestBody.SetOrigin(origin)

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

Important

For details about how to add the SDK to your project and create an authProvider instance, see the SDK documentation.


// 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.Attachment attachment = new com.microsoft.graph.beta.models.security.casemanagement.Attachment();
attachment.setOdataType("#microsoft.graph.security.caseManagement.attachment");
attachment.setDisplayName("Case MS-001 Attachment");
attachment.setDescription("Screenshot of suspicious sign-in activity");
attachment.setFileSize(1000L);
attachment.setFileExtension("jpeg");
attachment.setScanResult(com.microsoft.graph.beta.models.security.casemanagement.AttachmentScanResult.NoThreatsFound);
com.microsoft.graph.beta.models.security.casemanagement.AttachmentOrigin origin = new com.microsoft.graph.beta.models.security.casemanagement.AttachmentOrigin();
origin.setOdataType("microsoft.graph.security.caseManagement.attachmentOrigin");
origin.setResourceId("987757fb-6ef4-1061-17e7-9de0d088e1dd");
origin.setResourceType(com.microsoft.graph.beta.models.security.casemanagement.AttachmentOriginType.Case);
attachment.setOrigin(origin);
com.microsoft.graph.models.security.casemanagement.Attachment result = graphClient.security().caseManagement().cases().byCaseId("{case-id}").attachments().post(attachment);

Important

For details about how to add the SDK to your project and create an authProvider instance, see the SDK documentation.


const options = {
	authProvider,
};

const client = Client.init(options);

const attachment = {
  '@odata.type': '#microsoft.graph.security.caseManagement.attachment',
  displayName: 'Case MS-001 Attachment',
  description: 'Screenshot of suspicious sign-in activity',
  fileSize: 1000,
  fileExtension: 'jpeg',
  scanResult: 'noThreatsFound',
  origin: {
    '@odata.type': 'microsoft.graph.security.caseManagement.attachmentOrigin',
    resourceId: '987757fb-6ef4-1061-17e7-9de0d088e1dd',
    resourceType: 'case'
  }
};

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

Important

For details about how to add the SDK to your project and create an authProvider instance, see the SDK documentation.


<?php
use Microsoft\Graph\Beta\GraphServiceClient;
use Microsoft\Graph\Beta\Generated\Models\Security\CaseManagement\Attachment;
use Microsoft\Graph\Beta\Generated\Models\Security\CaseManagement\AttachmentScanResult;
use Microsoft\Graph\Beta\Generated\Models\Security\CaseManagement\AttachmentOrigin;
use Microsoft\Graph\Beta\Generated\Models\Security\CaseManagement\AttachmentOriginType;


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

$requestBody = new Attachment();
$requestBody->setOdataType('#microsoft.graph.security.caseManagement.attachment');
$requestBody->setDisplayName('Case MS-001 Attachment');
$requestBody->setDescription('Screenshot of suspicious sign-in activity');
$requestBody->setFileSize(1000);
$requestBody->setFileExtension('jpeg');
$requestBody->setScanResult(new AttachmentScanResult('noThreatsFound'));
$origin = new AttachmentOrigin();
$origin->setOdataType('microsoft.graph.security.caseManagement.attachmentOrigin');
$origin->setResourceId('987757fb-6ef4-1061-17e7-9de0d088e1dd');
$origin->setResourceType(new AttachmentOriginType('case'));
$requestBody->setOrigin($origin);

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

Important

For details about how to add the SDK to your project and create an authProvider instance, see the SDK documentation.


# 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.attachment import Attachment
from msgraph_beta.generated.models.attachment_scan_result import AttachmentScanResult
from msgraph_beta.generated.models.security.case_management.attachment_origin import AttachmentOrigin
from msgraph_beta.generated.models.attachment_origin_type import AttachmentOriginType
# To initialize your graph_client, see https://learn.microsoft.com/en-us/graph/sdks/create-client?from=snippets&tabs=python
request_body = Attachment(
	odata_type = "#microsoft.graph.security.caseManagement.attachment",
	display_name = "Case MS-001 Attachment",
	description = "Screenshot of suspicious sign-in activity",
	file_size = 1000,
	file_extension = "jpeg",
	scan_result = AttachmentScanResult.NoThreatsFound,
	origin = AttachmentOrigin(
		odata_type = "microsoft.graph.security.caseManagement.attachmentOrigin",
		resource_id = "987757fb-6ef4-1061-17e7-9de0d088e1dd",
		resource_type = AttachmentOriginType.Case,
	),
)

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

Important

For details about how to add the SDK to your project and create an authProvider instance, see the SDK documentation.

Response

The following example shows the response.

HTTP/1.1 201 Created
Content-Type: application/json

{
  "@odata.type": "#microsoft.graph.security.caseManagement.attachment",
  "id": "1719f11c-21e9-acf2-85db-ade533556fba",
  "createdDateTime": "2026-05-20T11:12:28Z",
  "createdBy": "user@contoso.com",
  "lastModifiedDateTime": "2026-05-20T11:18:45Z",
  "lastModifiedBy": "user@contoso.com",
  "displayName": "Case MS-001 Attachment",
  "description": "Screenshot of suspicious sign-in activity",
  "fileSize": 1000,
  "fileExtension": ".jpeg",
  "scanResult": "unscanned"
}

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Last updated on 2026-08-20

Create case attachment

Permissions

HTTP request

Request headers

Request body

Response

Examples

Request

Response

Feedback

Additional resources