Namespace: microsoft.graph
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.
Use this API to add an attachment to an existing event. This operation limits the size of the attachment you can add to under 3 MB.
If an organizer adds an attachment to a meeting event, the organizer can subsequently update the event to send the attachment and update the event for each attendee as well.
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) |
Calendars.ReadWrite |
Not available. |
Delegated (personal Microsoft account) |
Calendars.ReadWrite |
Not available. |
Application |
Calendars.ReadWrite |
Not available. |
HTTP request
POST /me/events/{id}/attachments
POST /users/{id | userPrincipalName}/events/{id}/attachments
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.
POST https://graph.microsoft.com/beta/me/events/AAMkAGI1AAAt9AHjAAA=/attachments
Content-type: application/json
{
"@odata.type": "#microsoft.graph.fileAttachment",
"name": "menu.txt",
"contentBytes": "bWFjIGFuZCBjaGVlc2UgdG9kYXk="
}
// Code snippets are only available for the latest version. Current version is 5.x
// Dependencies
using Microsoft.Graph.Beta.Models;
var requestBody = new FileAttachment
{
OdataType = "#microsoft.graph.fileAttachment",
Name = "menu.txt",
ContentBytes = Convert.FromBase64String("bWFjIGFuZCBjaGVlc2UgdG9kYXk="),
};
// 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);
mgc-beta users events attachments create --user-id {user-id} --event-id {event-id} --body '{\
"@odata.type": "#microsoft.graph.fileAttachment",\
"name": "menu.txt",\
"contentBytes": "bWFjIGFuZCBjaGVlc2UgdG9kYXk="\
}\
'
// 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"
graphmodels "github.com/microsoftgraph/msgraph-beta-sdk-go/models"
//other-imports
)
requestBody := graphmodels.NewAttachment()
name := "menu.txt"
requestBody.SetName(&name)
contentBytes := []byte("bWFjIGFuZCBjaGVlc2UgdG9kYXk=")
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().Events().ByEventId("event-id").Attachments().Post(context.Background(), requestBody, nil)
// 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("menu.txt");
byte[] contentBytes = Base64.getDecoder().decode("bWFjIGFuZCBjaGVlc2UgdG9kYXk=");
attachment.setContentBytes(contentBytes);
Attachment result = graphClient.me().events().byEventId("{event-id}").attachments().post(attachment);
const options = {
authProvider,
};
const client = Client.init(options);
const attachment = {
'@odata.type': '#microsoft.graph.fileAttachment',
name: 'menu.txt',
contentBytes: 'bWFjIGFuZCBjaGVlc2UgdG9kYXk='
};
await client.api('/me/events/AAMkAGI1AAAt9AHjAAA=/attachments')
.version('beta')
.post(attachment);
<?php
use Microsoft\Graph\Beta\GraphServiceClient;
use Microsoft\Graph\Beta\Generated\Models\FileAttachment;
$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);
$requestBody = new FileAttachment();
$requestBody->setOdataType('#microsoft.graph.fileAttachment');
$requestBody->setName('menu.txt');
$requestBody->setContentBytes(\GuzzleHttp\Psr7\Utils::streamFor(base64_decode('bWFjIGFuZCBjaGVlc2UgdG9kYXk=')));
$result = $graphServiceClient->me()->events()->byEventId('event-id')->attachments()->post($requestBody)->wait();
Import-Module Microsoft.Graph.Beta.Calendar
$params = @{
"@odata.type" = "#microsoft.graph.fileAttachment"
name = "menu.txt"
contentBytes = "bWFjIGFuZCBjaGVlc2UgdG9kYXk="
}
# A UPN can also be used as -UserId.
New-MgBetaUserEventAttachment -UserId $userId -EventId $eventId -BodyParameter $params
# Code snippets are only available for the latest version. Current version is 1.x
from msgraph_beta import GraphServiceClient
from msgraph_beta.generated.models.file_attachment import FileAttachment
# To initialize your graph_client, see https://learn.microsoft.com/en-us/graph/sdks/create-client?from=snippets&tabs=python
request_body = FileAttachment(
odata_type = "#microsoft.graph.fileAttachment",
name = "menu.txt",
content_bytes = base64.urlsafe_b64decode("bWFjIGFuZCBjaGVlc2UgdG9kYXk="),
)
result = await graph_client.me.events.by_event_id('event-id').attachments.post(request_body)
In the request body, supply a JSON representation of attachment object.
Response
The following example shows the response. Note: The response object shown here might be shortened for readability.
HTTP 201 Created
Content-Length: 735
{
"@odata.context":"https://graph.microsoft.com/beta/$metadata#users('cd209b0b-3f83-4c35-82d2-d88a61820480')/events('AAMkAGI1AAAt9AHjAAA%3D')/attachments/$entity",
"@odata.type":"#microsoft.graph.fileAttachment",
"id":"AAMkAGI1AAAt9AHjAAABEgAQAEdBogju-MJEu6Ngg-1_W0g=",
"lastModifiedDateTime":"2017-04-15T03:21:49Z",
"name":"menu.txt",
"contentType":"text/plain",
"size":178,
"isInline":false,
"contentId":null,
"contentLocation":null,
"contentBytes":"bWFjIGFuZCBjaGVlc2UgdG9kYXk="
}
Example (item attachment)
Request
Here is an example which attaches an event with another event as an item attachment.
POST https://graph.microsoft.com/beta/me/events/AAMkAGI1AAAt9AHjAAA=/attachments
Content-type: application/json
{
"@odata.type": "#microsoft.graph.itemAttachment",
"name": "Holiday event",
"item": {
"@odata.type": "microsoft.graph.event",
"subject": "Discuss gifts for children",
"body": {
"contentType": "HTML",
"content": "Let's look for funding!"
},
"start": {
"dateTime": "2016-12-02T18:00:00",
"timeZone": "Pacific Standard Time"
},
"end": {
"dateTime": "2016-12-02T19:00:00",
"timeZone": "Pacific Standard Time"
}
}
}
// Code snippets are only available for the latest version. Current version is 5.x
// Dependencies
using Microsoft.Graph.Beta.Models;
var requestBody = new ItemAttachment
{
OdataType = "#microsoft.graph.itemAttachment",
Name = "Holiday event",
Item = new Event
{
OdataType = "microsoft.graph.event",
Subject = "Discuss gifts for children",
Body = new ItemBody
{
ContentType = BodyType.Html,
Content = "Let's look for funding!",
},
Start = new DateTimeTimeZone
{
DateTime = "2016-12-02T18:00:00",
TimeZone = "Pacific Standard Time",
},
End = new DateTimeTimeZone
{
DateTime = "2016-12-02T19:00:00",
TimeZone = "Pacific Standard Time",
},
},
};
// 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);
mgc-beta users events attachments create --user-id {user-id} --event-id {event-id} --body '{\
"@odata.type": "#microsoft.graph.itemAttachment",\
"name": "Holiday event",\
"item": {\
"@odata.type": "microsoft.graph.event",\
"subject": "Discuss gifts for children",\
"body": {\
"contentType": "HTML",\
"content": "Let's look for funding!"\
},\
"start": {\
"dateTime": "2016-12-02T18:00:00",\
"timeZone": "Pacific Standard Time"\
},\
"end": {\
"dateTime": "2016-12-02T19:00:00",\
"timeZone": "Pacific Standard Time"\
}\
}\
}\
'
// 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"
graphmodels "github.com/microsoftgraph/msgraph-beta-sdk-go/models"
//other-imports
)
requestBody := graphmodels.NewAttachment()
name := "Holiday event"
requestBody.SetName(&name)
item := graphmodels.NewEvent()
subject := "Discuss gifts for children"
item.SetSubject(&subject)
body := graphmodels.NewItemBody()
contentType := graphmodels.HTML_BODYTYPE
body.SetContentType(&contentType)
content := "Let's look for funding!"
body.SetContent(&content)
item.SetBody(body)
start := graphmodels.NewDateTimeTimeZone()
dateTime := "2016-12-02T18:00:00"
start.SetDateTime(&dateTime)
timeZone := "Pacific Standard Time"
start.SetTimeZone(&timeZone)
item.SetStart(start)
end := graphmodels.NewDateTimeTimeZone()
dateTime := "2016-12-02T19:00:00"
end.SetDateTime(&dateTime)
timeZone := "Pacific Standard Time"
end.SetTimeZone(&timeZone)
item.SetEnd(end)
requestBody.SetItem(item)
// 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)
// Code snippets are only available for the latest version. Current version is 6.x
GraphServiceClient graphClient = new GraphServiceClient(requestAdapter);
ItemAttachment attachment = new ItemAttachment();
attachment.setOdataType("#microsoft.graph.itemAttachment");
attachment.setName("Holiday event");
Event item = new Event();
item.setOdataType("microsoft.graph.event");
item.setSubject("Discuss gifts for children");
ItemBody body = new ItemBody();
body.setContentType(BodyType.Html);
body.setContent("Let's look for funding!");
item.setBody(body);
DateTimeTimeZone start = new DateTimeTimeZone();
start.setDateTime("2016-12-02T18:00:00");
start.setTimeZone("Pacific Standard Time");
item.setStart(start);
DateTimeTimeZone end = new DateTimeTimeZone();
end.setDateTime("2016-12-02T19:00:00");
end.setTimeZone("Pacific Standard Time");
item.setEnd(end);
attachment.setItem(item);
Attachment result = graphClient.me().events().byEventId("{event-id}").attachments().post(attachment);
const options = {
authProvider,
};
const client = Client.init(options);
const attachment = {
'@odata.type': '#microsoft.graph.itemAttachment',
name: 'Holiday event',
item: {
'@odata.type': 'microsoft.graph.event',
subject: 'Discuss gifts for children',
body: {
contentType: 'HTML',
content: 'Let\'s look for funding!'
},
start: {
dateTime: '2016-12-02T18:00:00',
timeZone: 'Pacific Standard Time'
},
end: {
dateTime: '2016-12-02T19:00:00',
timeZone: 'Pacific Standard Time'
}
}
};
await client.api('/me/events/AAMkAGI1AAAt9AHjAAA=/attachments')
.version('beta')
.post(attachment);
<?php
use Microsoft\Graph\Beta\GraphServiceClient;
use Microsoft\Graph\Beta\Generated\Models\ItemAttachment;
use Microsoft\Graph\Beta\Generated\Models\Event;
use Microsoft\Graph\Beta\Generated\Models\ItemBody;
use Microsoft\Graph\Beta\Generated\Models\BodyType;
use Microsoft\Graph\Beta\Generated\Models\DateTimeTimeZone;
$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);
$requestBody = new ItemAttachment();
$requestBody->setOdataType('#microsoft.graph.itemAttachment');
$requestBody->setName('Holiday event');
$item = new Event();
$item->setOdataType('microsoft.graph.event');
$item->setSubject('Discuss gifts for children');
$itemBody = new ItemBody();
$itemBody->setContentType(new BodyType('hTML'));
$itemBody->setContent('Let\'s look for funding!');
$item->setBody($itemBody);
$itemStart = new DateTimeTimeZone();
$itemStart->setDateTime('2016-12-02T18:00:00');
$itemStart->setTimeZone('Pacific Standard Time');
$item->setStart($itemStart);
$itemEnd = new DateTimeTimeZone();
$itemEnd->setDateTime('2016-12-02T19:00:00');
$itemEnd->setTimeZone('Pacific Standard Time');
$item->setEnd($itemEnd);
$requestBody->setItem($item);
$result = $graphServiceClient->me()->events()->byEventId('event-id')->attachments()->post($requestBody)->wait();
Import-Module Microsoft.Graph.Beta.Calendar
$params = @{
"@odata.type" = "#microsoft.graph.itemAttachment"
name = "Holiday event"
item = @{
"@odata.type" = "microsoft.graph.event"
subject = "Discuss gifts for children"
body = @{
contentType = "HTML"
content = "Let's look for funding!"
}
start = @{
dateTime = "2016-12-02T18:00:00"
timeZone = "Pacific Standard Time"
}
end = @{
dateTime = "2016-12-02T19:00:00"
timeZone = "Pacific Standard Time"
}
}
}
# A UPN can also be used as -UserId.
New-MgBetaUserEventAttachment -UserId $userId -EventId $eventId -BodyParameter $params
# Code snippets are only available for the latest version. Current version is 1.x
from msgraph_beta import GraphServiceClient
from msgraph_beta.generated.models.item_attachment import ItemAttachment
from msgraph_beta.generated.models.event import Event
from msgraph_beta.generated.models.item_body import ItemBody
from msgraph_beta.generated.models.body_type import BodyType
from msgraph_beta.generated.models.date_time_time_zone import DateTimeTimeZone
# To initialize your graph_client, see https://learn.microsoft.com/en-us/graph/sdks/create-client?from=snippets&tabs=python
request_body = ItemAttachment(
odata_type = "#microsoft.graph.itemAttachment",
name = "Holiday event",
item = Event(
odata_type = "microsoft.graph.event",
subject = "Discuss gifts for children",
body = ItemBody(
content_type = BodyType.Html,
content = "Let's look for funding!",
),
start = DateTimeTimeZone(
date_time = "2016-12-02T18:00:00",
time_zone = "Pacific Standard Time",
),
end = DateTimeTimeZone(
date_time = "2016-12-02T19:00:00",
time_zone = "Pacific Standard Time",
),
),
)
result = await graph_client.me.events.by_event_id('event-id').attachments.post(request_body)
Response
The following example shows the response. Note: The response object shown here might be shortened for readability.
HTTP 201 Created
Content-type: application/json
{
"@odata.context":"https://graph.microsoft.com/beta/$metadata#me/events('AAMkAGI1AAAt9AHjAAA=')/attachments/$entity",
"@odata.type":"#microsoft.graph.itemAttachment",
"@odata.id":"https://graph.microsoft.com/beta/users('fdcbcf34-2505-4d07-be5b-0a55b699d157@41a5b830-45ac-4f1b-9bfc-baafa3b7db2e')/events('AAMkAGI1AAAt9AHjAAA=')/attachments('AAMkADNkN2Jp5JVnQIe9r0=')",
"id":"AAMkADNkNJp5JVnQIe9r0=",
"lastModifiedDateTime":"2016-12-01T22:27:13Z",
"name":"Holiday event",
"contentType":null,
"size":2473,
"isInline":false
}
Example (reference attachment)
Request
The following example shows a request that adds a reference attachment to an existing event.
The attachment points to a folder on OneDrive.
POST https://graph.microsoft.com/beta/me/events/AAMkAGE1M88AADUv0uAAAG=/attachments
Content-type: application/json
{
"@odata.type": "#microsoft.graph.referenceAttachment",
"name": "Personal pictures",
"sourceUrl": "https://contoso.com/personal/mario_contoso_net/Documents/Pics",
"providerType": "oneDriveConsumer",
"permission": "Edit",
"isFolder": "True"
}
// Code snippets are only available for the latest version. Current version is 5.x
// Dependencies
using Microsoft.Graph.Beta.Models;
var requestBody = new ReferenceAttachment
{
OdataType = "#microsoft.graph.referenceAttachment",
Name = "Personal pictures",
SourceUrl = "https://contoso.com/personal/mario_contoso_net/Documents/Pics",
ProviderType = ReferenceAttachmentProvider.OneDriveConsumer,
Permission = ReferenceAttachmentPermission.Edit,
IsFolder = true,
};
// 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);
mgc-beta users events attachments create --user-id {user-id} --event-id {event-id} --body '{\
"@odata.type": "#microsoft.graph.referenceAttachment",\
"name": "Personal pictures",\
"sourceUrl": "https://contoso.com/personal/mario_contoso_net/Documents/Pics",\
"providerType": "oneDriveConsumer",\
"permission": "Edit",\
"isFolder": "True"\
}\
'
// 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"
graphmodels "github.com/microsoftgraph/msgraph-beta-sdk-go/models"
//other-imports
)
requestBody := graphmodels.NewAttachment()
name := "Personal pictures"
requestBody.SetName(&name)
sourceUrl := "https://contoso.com/personal/mario_contoso_net/Documents/Pics"
requestBody.SetSourceUrl(&sourceUrl)
providerType := graphmodels.ONEDRIVECONSUMER_REFERENCEATTACHMENTPROVIDER
requestBody.SetProviderType(&providerType)
permission := graphmodels.EDIT_REFERENCEATTACHMENTPERMISSION
requestBody.SetPermission(&permission)
isFolder := true
requestBody.SetIsFolder(&isFolder)
// 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)
// Code snippets are only available for the latest version. Current version is 6.x
GraphServiceClient graphClient = new GraphServiceClient(requestAdapter);
ReferenceAttachment attachment = new ReferenceAttachment();
attachment.setOdataType("#microsoft.graph.referenceAttachment");
attachment.setName("Personal pictures");
attachment.setSourceUrl("https://contoso.com/personal/mario_contoso_net/Documents/Pics");
attachment.setProviderType(ReferenceAttachmentProvider.OneDriveConsumer);
attachment.setPermission(ReferenceAttachmentPermission.Edit);
attachment.setIsFolder(true);
Attachment result = graphClient.me().events().byEventId("{event-id}").attachments().post(attachment);
const options = {
authProvider,
};
const client = Client.init(options);
const attachment = {
'@odata.type': '#microsoft.graph.referenceAttachment',
name: 'Personal pictures',
sourceUrl: 'https://contoso.com/personal/mario_contoso_net/Documents/Pics',
providerType: 'oneDriveConsumer',
permission: 'Edit',
isFolder: 'True'
};
await client.api('/me/events/AAMkAGE1M88AADUv0uAAAG=/attachments')
.version('beta')
.post(attachment);
<?php
use Microsoft\Graph\Beta\GraphServiceClient;
use Microsoft\Graph\Beta\Generated\Models\ReferenceAttachment;
use Microsoft\Graph\Beta\Generated\Models\ReferenceAttachmentProvider;
use Microsoft\Graph\Beta\Generated\Models\ReferenceAttachmentPermission;
$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);
$requestBody = new ReferenceAttachment();
$requestBody->setOdataType('#microsoft.graph.referenceAttachment');
$requestBody->setName('Personal pictures');
$requestBody->setSourceUrl('https://contoso.com/personal/mario_contoso_net/Documents/Pics');
$requestBody->setProviderType(new ReferenceAttachmentProvider('oneDriveConsumer'));
$requestBody->setPermission(new ReferenceAttachmentPermission('edit'));
$requestBody->setIsFolder(true);
$result = $graphServiceClient->me()->events()->byEventId('event-id')->attachments()->post($requestBody)->wait();
Import-Module Microsoft.Graph.Beta.Calendar
$params = @{
"@odata.type" = "#microsoft.graph.referenceAttachment"
name = "Personal pictures"
sourceUrl = "https://contoso.com/personal/mario_contoso_net/Documents/Pics"
providerType = "oneDriveConsumer"
permission = "Edit"
isFolder = "True"
}
# A UPN can also be used as -UserId.
New-MgBetaUserEventAttachment -UserId $userId -EventId $eventId -BodyParameter $params
# Code snippets are only available for the latest version. Current version is 1.x
from msgraph_beta import GraphServiceClient
from msgraph_beta.generated.models.reference_attachment import ReferenceAttachment
from msgraph_beta.generated.models.reference_attachment_provider import ReferenceAttachmentProvider
from msgraph_beta.generated.models.reference_attachment_permission import ReferenceAttachmentPermission
# To initialize your graph_client, see https://learn.microsoft.com/en-us/graph/sdks/create-client?from=snippets&tabs=python
request_body = ReferenceAttachment(
odata_type = "#microsoft.graph.referenceAttachment",
name = "Personal pictures",
source_url = "https://contoso.com/personal/mario_contoso_net/Documents/Pics",
provider_type = ReferenceAttachmentProvider.OneDriveConsumer,
permission = ReferenceAttachmentPermission.Edit,
is_folder = True,
)
result = await graph_client.me.events.by_event_id('event-id').attachments.post(request_body)
Response
Here is an example of a full response.
HTTP 201 Created
{
"@odata.context": "https://graph.microsoft.com/beta/$metadata#users/ddfcd489-628b-40d7-b48b-57002df800e5/events/AAMkAGE1M88AADUv0uAAAG%3D/attachments/$entity",
"@odata.type": "#microsoft.graph.referenceAttachment",
"id": "AAMkAGE1Mg72tgf7hJp0PCGVCIc0g=",
"lastModifiedDateTime": "2016-03-12T06:04:38Z",
"name": "Personal pictures",
"contentType": null,
"size": 382,
"isInline": false,
"sourceUrl": "https://contoso.com/personal/mario_contoso_net/Documents/Pics",
"providerType": "oneDriveConsumer",
"thumbnailUrl": null,
"previewUrl": null,
"permission": "edit",
"isFolder": true
}