---
title: "Changes to Create large file attachment upload session from user"
method: POST
path: "/users/{userIdentifier}/messages/{messageId}/attachments/createUploadSession"
---

# Changes to Create large file attachment upload session from user

`POST /users/{userIdentifier}/messages/{messageId}/attachments/createUploadSession`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 2 of 10 revisions.

- **2026-06-18** `990ed583c385`: 1 info
- **2026-05-28** `c6fc1d98f528`: 1 breaking

## Changes

- **2026-06-18** `990ed583c385`: 1 info
  - endpoint added
- **2026-05-28** `c6fc1d98f528`: 1 breaking
  - api path removed without deprecation

---

[Operation](https://skmtc.dev/ballerina-platform/apis/microsoft-graph-mail-api/docs/users/:userIdentifier/messages/:messageId/attachments/createUploadSession/post.md) - [API](https://skmtc.dev/ballerina-platform/apis/microsoft-graph-mail-api.md) - [Page](https://skmtc.dev/ballerina-platform/apis/microsoft-graph-mail-api/changes/users/:userIdentifier/messages/:messageId/attachments/createUploadSession/post)