BAballerina-platform

users.message

Create large file attachment upload session from user

Changed on Jun 18, 2026

Create an upload session that allows an app to iteratively upload ranges of a file to attach to a message in a specific user's mailbox.

post/users/{userIdentifier}/messages/{messageId}/attachments/createUploadSession

Request

Base URL
https://graph.microsoft.com/v1.0
Auth
OAuth 2
Authorization codehttps://login.microsoftonline.com/common/oauth2/v2.0/authorize
Client credentials
Token URLhttps://login.microsoftonline.com/common/oauth2/v2.0/token
ScopesMail.Read, Mail.ReadWrite, Mail.Send
TypeScript
https://skmtc.dev/ballerina-platform/apis/microsoft-graph-mail-api/docs/users/:userIdentifier/messages/:messageId/attachments/createUploadSession/post.ts
A function with typed inputs. Its response is checked against the schema.

Request body

Response

Success - returns an upload session

OR

UploadSessionCompletedResponse nullable required

Changes

Jun 18, 2026990ed583c385 Revision changes
- info
  endpoint added
May 28, 2026c6fc1d98f528 Revision changes
- breaking
  api path removed without deprecation

Operation history