Microsoft: Invoke action create Upload Session — me Mail Folder mail Folders Messages Attachments Create Upload Session

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Operation microsoft.me_mailfolders_mailfolder_messages_message_attachments_createuploadsession

Provider route: POST /me/mailFolders/{mailFolder-id}/messages/{message-id}/attachments/createUploadSession. Alter supplies the connection’s credentials and routing.

Call through Alter

Install @alter-ai/sdk @alter-ai/microsoft with npm, or alter-sdk-microsoft with pip. Supply your connected customer’s grant ID and the arguments described below.

import { App } from "@alter-ai/sdk";
import { MicrosoftIntegration } from "@alter-ai/microsoft";

async function execute(input: Parameters<MicrosoftIntegration["meMailFolder"]["mailFoldersMessagesAttachmentsCreateUploadSession"]>[0]) {
  const app = new App({ apiKey: process.env.ALTER_API_KEY! });
  try {
    const provider = new MicrosoftIntegration(app, { grantId: process.env.PROVIDER_GRANT_ID! });
    const call = await provider.meMailFolder.mailFoldersMessagesAttachmentsCreateUploadSession(input);
    const result = await call.wait();
    return result.bodyJson();
  } finally {
    await app.close();
  }
}

import os
from alter_sdk import App
from alter_sdk_microsoft import MicrosoftIntegration

async def execute(arguments):
    async with App(api_key=os.environ["ALTER_API_KEY"]) as app:
        provider = MicrosoftIntegration(app, {"grant_id": os.environ["PROVIDER_GRANT_ID"]})
        call = await provider.me_mail_folder.mail_folders_messages_attachments_create_upload_session(arguments)
        result = await call.wait()
        return result.body_json()

Input

Field	Type	Presence	Description and constraints
$	object	Root	Additional keys: not allowed
path	object	Required within parent	Additional keys: not allowed
path.mailFolder-id	string	Required within parent
path.message-id	string	Required within parent
body	object	Required within parent
body.AttachmentItem	Model	Optional	Expand Invoke action create Upload Session — me Event events Attachments Create Upload Session — request body — body Attachment Item

Referenced models: Invoke action create Upload Session — me Event events Attachments Create Upload Session — request body — body Attachment Item

Response

Response media type: application/json. The table describes the pinned successful response. Referenced models link to their complete fields.

Field	Type	Presence	Description and constraints
$	JSON	Root
$ (anyOf 1)	Model	Alternative	Expand Invoke action create Upload Session — me Event events Attachments Create Upload Session — response body — @odata type, expiration Date Time, next Expected Ranges, upload Url
$ (anyOf 2)	JSON	Alternative
$ (anyOf 2) (anyOf 1)	object	Alternative
$ (anyOf 2) (anyOf 2)	null	Alternative

Referenced models: Invoke action create Upload Session — me Event events Attachments Create Upload Session — response body — @odata type, expiration Date Time, next Expected Ranges, upload Url

Schemas

Invoke action create Upload Session — me Event events Attachments Create Upload Session — response body — @odata type, expiration Date Time, next Expected Ranges, upload Url

Field	Type	Presence	Description and constraints
$	object	Root
@odata.type	string	Optional
expirationDateTime	JSON	Optional
expirationDateTime (anyOf 1)	string	Alternative	The date and time in UTC that the upload session expires. The complete file must be uploaded before this expiration time is reached. Each fragment uploaded during the session extends the expiration time. Format: date-time Pattern: ^[0-9]{4,}-(0[1-9]|1[012])-(0[1-9]|[12][0-9]|3[01])T([01][0-9]|2[0-3]):[0-5][0-9]:[0-5][0-9]([.][0-9]{1,12})?(Z|[+-][0-9][0-9]:[0-9][0-9])$
expirationDateTime (anyOf 2)	null	Alternative
nextExpectedRanges	array	Optional	A collection of byte ranges that the server is missing for the file. These ranges are zero indexed and of the format 'start-end' (for example '0-26' to indicate the first 27 bytes of the file). When uploading files as Outlook attachments, instead of a collection of ranges, this property always indicates a single value '{start}', the location in the file where the next upload should begin.
nextExpectedRanges[]	JSON	Each item
nextExpectedRanges[] (anyOf 1)	string	Alternative
nextExpectedRanges[] (anyOf 2)	null	Alternative
uploadUrl	JSON	Optional
uploadUrl (anyOf 1)	string	Alternative	The URL endpoint that accepts PUT requests for byte ranges of the file.
uploadUrl (anyOf 2)	null	Alternative

Invoke action create Upload Session — me Event events Attachments Create Upload Session — request body — body Attachment Item

Field	Type	Presence	Description and constraints
$	object	Root
@odata.type	string	Optional
attachmentType	JSON	Optional	The type of attachment. The possible values are: file, item, reference. Required.
attachmentType (anyOf 1)	string	Alternative	One of: file, item, reference
attachmentType (anyOf 2)	JSON	Alternative
attachmentType (anyOf 2) (anyOf 1)	object	Alternative
attachmentType (anyOf 2) (anyOf 2)	null	Alternative
contentId	JSON	Optional
contentId (anyOf 1)	string	Alternative	The CID or Content-Id of the attachment for referencing for the in-line attachments using the <img src='cid:contentId'> tag in HTML messages. Optional.
contentId (anyOf 2)	null	Alternative
contentType	JSON	Optional
contentType (anyOf 1)	string	Alternative	The nature of the data in the attachment. Optional.
contentType (anyOf 2)	null	Alternative
isInline	JSON	Optional
isInline (anyOf 1)	boolean	Alternative	true if the attachment is an inline attachment; otherwise, false. Optional.
isInline (anyOf 2)	null	Alternative
name	JSON	Optional
name (anyOf 1)	string	Alternative	The display name of the attachment. This can be a descriptive string and doesn't have to be the actual file name. Required.
name (anyOf 2)	null	Alternative
size	JSON	Optional
size (anyOf 1)	number	Alternative	The length of the attachment in bytes. Required. Format: int64
size (anyOf 2)	null	Alternative

Policy, approvals and errors

SDK function policy ID: microsoft.me_mailfolders_mailfolder_messages_message_attachments_createuploadsession. Catalog operation: me_mailfolders_mailfolder_messages_message_attachments_createuploadsession. Rules can name either ID; function rules distinguish managed calls and conservatively cover raw calls sharing the route. Existing grant permissions and policy rules apply. wait() returns an immediate result or waits for a required approval; it never approves the request itself. Persist the approval ID to resume after a restart.

Provider errors retain their response; JSON decoding raises ProviderAPIError for provider failures. ManagedOperationError identifies contract/input/retention errors. See error handling and provider-specific behavior. Sensitive input may be refused before approval storage. A decoding error never resubmits a write.

Official provider source