Add attachment

Namespace: microsoft.graph

Use this API to create a new Attachment.

An attachment can be one of the following types:

• A file (fileAttachment resource).
• An item (contact, event or message, represented by an itemAttachment resource).
• A link to a file (referenceAttachment resource).

All these types of attachment resources are derived from the attachment resource.

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)	Mail.ReadWrite	Not available.
Delegated (personal Microsoft account)	Mail.ReadWrite	Not available.
Application	Mail.ReadWrite	Not available.

HTTP request

POST /me/messages/{id}/attachments
POST /users/{id | userPrincipalName}/messages/{id}/attachments

Request headers

Name	Type	Description
Authorization	string	Bearer {token}. Required. Learn more about authentication and authorization.
Content-Type	string	Nature of the data in the body of an entity. Required.

Request body

In the request body, supply a JSON representation of Attachment object.

Response

If successful, this method returns 201 Created response code and Attachment object in the response body.

Example (File attachment)

Request

The following example shows a request.

HTTP

POST https://graph.microsoft.com/v1.0/me/messages/{id}/attachments
Content-type: application/json

{
  "@odata.type": "microsoft.graph.fileAttachment",
  "name": "name-value",
  "contentType": "contentType-value",
  "isInline": false,
  "contentLocation": "contentLocation-value",
  "contentBytes": "base64-contentBytes-value"
}

C#

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

// Dependencies
using Microsoft.Graph.Models;

var requestBody = new FileAttachment
{
	OdataType = "microsoft.graph.fileAttachment",
	Name = "name-value",
	ContentType = "contentType-value",
	IsInline = false,
	ContentLocation = "contentLocation-value",
	ContentBytes = Convert.FromBase64String("base64-contentBytes-value"),
};

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

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

CLI

mgc users messages attachments create --user-id {user-id} --message-id {message-id} --body '{\
  "@odata.type": "microsoft.graph.fileAttachment",\
  "name": "name-value",\
  "contentType": "contentType-value",\
  "isInline": false,\
  "contentLocation": "contentLocation-value",\
  "contentBytes": "base64-contentBytes-value"\
}\
'

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

Go

// Code snippets are only available for the latest major version. Current major version is $v1.*

// Dependencies
import (
	  "context"
	  msgraphsdk "github.com/microsoftgraph/msgraph-sdk-go"
	  graphmodels "github.com/microsoftgraph/msgraph-sdk-go/models"
	  //other-imports
)

requestBody := graphmodels.NewAttachment()
name := "name-value"
requestBody.SetName(&name) 
contentType := "contentType-value"
requestBody.SetContentType(&contentType) 
isInline := false
requestBody.SetIsInline(&isInline) 
contentLocation := "contentLocation-value"
requestBody.SetContentLocation(&contentLocation) 
contentBytes := []byte("base64-contentBytes-value")
requestBody.SetContentBytes(&contentBytes) 

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

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

Java

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

GraphServiceClient graphClient = new GraphServiceClient(requestAdapter);

FileAttachment attachment = new FileAttachment();
attachment.setOdataType("microsoft.graph.fileAttachment");
attachment.setName("name-value");
attachment.setContentType("contentType-value");
attachment.setIsInline(false);
attachment.setContentLocation("contentLocation-value");
byte[] contentBytes = Base64.getDecoder().decode("base64-contentBytes-value");
attachment.setContentBytes(contentBytes);
Attachment result = graphClient.me().messages().byMessageId("{message-id}").attachments().post(attachment);

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

JavaScript

const options = {
	authProvider,
};

const client = Client.init(options);

const attachment = {
  '@odata.type': 'microsoft.graph.fileAttachment',
  name: 'name-value',
  contentType: 'contentType-value',
  isInline: false,
  contentLocation: 'contentLocation-value',
  contentBytes: 'base64-contentBytes-value'
};

await client.api('/me/messages/{id}/attachments')
	.post(attachment);

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

PHP

<?php
use Microsoft\Graph\GraphServiceClient;
use Microsoft\Graph\Generated\Models\FileAttachment;


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

$requestBody = new FileAttachment();
$requestBody->setOdataType('microsoft.graph.fileAttachment');
$requestBody->setName('name-value');
$requestBody->setContentType('contentType-value');
$requestBody->setIsInline(false);
$requestBody->setContentLocation('contentLocation-value');
$requestBody->setContentBytes(\GuzzleHttp\Psr7\Utils::streamFor(base64_decode('base64-contentBytes-value')));

$result = $graphServiceClient->me()->messages()->byMessageId('message-id')->attachments()->post($requestBody)->wait();

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

PowerShell

Import-Module Microsoft.Graph.Mail

$params = @{
	"@odata.type" = "microsoft.graph.fileAttachment"
	name = "name-value"
	contentType = "contentType-value"
	isInline = $false
	contentLocation = "contentLocation-value"
	contentBytes = "base64-contentBytes-value"
}

# A UPN can also be used as -UserId.
New-MgUserMessageAttachment -UserId $userId -MessageId $messageId -BodyParameter $params

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

Python

# Code snippets are only available for the latest version. Current version is 1.x
from msgraph import GraphServiceClient
from msgraph.generated.models.file_attachment import FileAttachment
# To initialize your graph_client, see https://learn.microsoft.com/en-us/graph/sdks/create-client?from=snippets&tabs=python
request_body = FileAttachment(
	odata_type = "microsoft.graph.fileAttachment",
	name = "name-value",
	content_type = "contentType-value",
	is_inline = False,
	content_location = "contentLocation-value",
	content_bytes = base64.urlsafe_b64decode("base64-contentBytes-value"),
)

result = await graph_client.me.messages.by_message_id('message-id').attachments.post(request_body)

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

In the request body, supply a JSON representation of attachment object.

Response

The following example shows the response. Note: The response object shown here might be shortened for readability.

HTTP/1.1 201 Created

Example (item attachment)

Request

HTTP

POST https://graph.microsoft.com/v1.0/me/events/{id}/attachments
Content-type: application/json

{
  "@odata.type": "#Microsoft.OutlookServices.ItemAttachment",
  "name": "name-value",
  "item": {
    "@odata.type": "microsoft.graph.message"
  }
}

C#

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

// Dependencies
using Microsoft.Graph.Models;

var requestBody = new Attachment
{
	OdataType = "#Microsoft.OutlookServices.ItemAttachment",
	Name = "name-value",
	AdditionalData = new Dictionary<string, object>
	{
		{
			"item" , new Message
			{
				OdataType = "microsoft.graph.message",
			}
		},
	},
};

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

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

CLI

mgc users events attachments create --user-id {user-id} --event-id {event-id} --body '{\
  "@odata.type": "#Microsoft.OutlookServices.ItemAttachment",\
  "name": "name-value",\
  "item": {\
    "@odata.type": "microsoft.graph.message"\
  }\
}\
'

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

Go

// Code snippets are only available for the latest major version. Current major version is $v1.*

// Dependencies
import (
	  "context"
	  msgraphsdk "github.com/microsoftgraph/msgraph-sdk-go"
	  graphmodels "github.com/microsoftgraph/msgraph-sdk-go/models"
	  //other-imports
)

requestBody := graphmodels.NewAttachment()
name := "name-value"
requestBody.SetName(&name) 
additionalData := map[string]interface{}{
item := graphmodels.NewMessage()
	requestBody.SetItem(item)
}
requestBody.SetAdditionalData(additionalData)

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

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

Java

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

GraphServiceClient graphClient = new GraphServiceClient(requestAdapter);

Attachment attachment = new Attachment();
attachment.setOdataType("#Microsoft.OutlookServices.ItemAttachment");
attachment.setName("name-value");
HashMap<String, Object> additionalData = new HashMap<String, Object>();
Message item = new Message();
item.setOdataType("microsoft.graph.message");
additionalData.put("item", item);
attachment.setAdditionalData(additionalData);
Attachment result = graphClient.me().events().byEventId("{event-id}").attachments().post(attachment);

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

JavaScript

const options = {
	authProvider,
};

const client = Client.init(options);

const attachment = {
  '@odata.type': '#Microsoft.OutlookServices.ItemAttachment',
  name: 'name-value',
  item: {
    '@odata.type': 'microsoft.graph.message'
  }
};

await client.api('/me/events/{id}/attachments')
	.post(attachment);

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

PHP

<?php
use Microsoft\Graph\GraphServiceClient;
use Microsoft\Graph\Generated\Models\Attachment;
use Microsoft\Graph\Generated\Models\Message;


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

$requestBody = new Attachment();
$requestBody->setOdataType('#Microsoft.OutlookServices.ItemAttachment');
$requestBody->setName('name-value');
$additionalData = [
	'item' => [
		'@odata.type' => 'microsoft.graph.message',
	],
];
$requestBody->setAdditionalData($additionalData);

$result = $graphServiceClient->me()->events()->byEventId('event-id')->attachments()->post($requestBody)->wait();

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

PowerShell

Import-Module Microsoft.Graph.Calendar

$params = @{
	"@odata.type" = "#Microsoft.OutlookServices.ItemAttachment"
	name = "name-value"
	item = @{
		"@odata.type" = "microsoft.graph.message"
	}
}

# A UPN can also be used as -UserId.
New-MgUserEventAttachment -UserId $userId -EventId $eventId -BodyParameter $params

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

Python

# Code snippets are only available for the latest version. Current version is 1.x
from msgraph import GraphServiceClient
from msgraph.generated.models.attachment import Attachment
from msgraph.generated.models.message import Message
# 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.OutlookServices.ItemAttachment",
	name = "name-value",
	additional_data = {
			"item" : {
					"@odata_type" : "microsoft.graph.message",
			},
	}
)

result = await graph_client.me.events.by_event_id('event-id').attachments.post(request_body)

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. Note: The response object shown here may be truncated for brevity. All of the properties will be returned from an actual call.

HTTP/1.1 201 Created