---
id: object/tableextension/8750
type: object
title: Table extension 8750 "Document Attachment Ext.Stor."
summary: Table extension 8750 "Document Attachment Ext.Stor." in External Storage - Document Attachments (Microsoft.ExternalStorage.DocumentAttachments), extends "Document Attachment". 6 fields, 2 public procedures. Introduced in BC29, still in BC30.
tier: official
language: en
tags:
  - tableextension
  - external storage - document attachments
versions:
  introduced: "29"
  last_changed: null
  deprecated: null
review:
  state: derived
  by: null
  at: null
  flags: []
generated:
  at: "2026-10-11T00:31:51.816Z"
  pipeline: 0.2.0
  prompts: {}
  input_hash: 689cb49493899ed11e414792f8448b223d66ee6728e4bbff1c09914d7553bae1
evidence:
  - kind: code
    url: https://github.com/microsoft/BCApps/blob/ea08af5ef2d6a9b5c5af4a029288abbe2c883220/src/Apps/W1/External%20Storage%20-%20Document%20Attachments/app/src/DocumentAttachmentIntegration/DocumentAttachmentExtStor.TableExt.al
    title: src/Apps/W1/External Storage - Document Attachments/app/src/DocumentAttachmentIntegration/DocumentAttachmentExtStor.TableExt.al (releases/29.x)
    date: null
    commit: ea08af5ef2d6a9b5c5af4a029288abbe2c883220
    t: null
    quote: null
links:
  learn: []
  objects:
    - object/table/1173
  features: []
  topics: []
  localizations: []
  videos: []
  posts: []
  guidelines: []
object_type: tableextension
object_id: 8750
name: Document Attachment Ext.Stor.
namespace: Microsoft.ExternalStorage.DocumentAttachments
app: External Storage - Document Attachments
extends: Document Attachment
first_version: "29"
last_version: "30"
present_in:
  - "29"
  - "30"
changed_in: []
source_major: "29"
obsolete: null
countries: []
ms_search_form_ids: []
counts:
  fields: 6
  procedures: 2
  events: 0
  subscribers: 0
relations:
  out: 1
  referenced_by: 0
  pages: 0
  extended_by: 0
  event_subscribers: 0
  calls: 0
  called_by: 0
  implements: 0
---

# Table extension 8750 "Document Attachment Ext.Stor."

> Table extension 8750 "Document Attachment Ext.Stor." in External Storage - Document Attachments (Microsoft.ExternalStorage.DocumentAttachments), extends "Document Attachment". 6 fields, 2 public procedures. Introduced in BC29, still in BC30.

External Storage - Document Attachments · Microsoft.ExternalStorage.DocumentAttachments · BC29-30 · [source at ea08af5e](https://github.com/microsoft/BCApps/blob/ea08af5ef2d6a9b5c5af4a029288abbe2c883220/src/Apps/W1/External%20Storage%20-%20Document%20Attachments/app/src/DocumentAttachmentIntegration/DocumentAttachmentExtStor.TableExt.al) · facts from BC29

Extends [Document Attachment](../table/1173.md).

## Fields

Explanation: the field's ToolTip in the code; without one, the ToolTip of a page control bound to the field (marked via the page); without that, its Caption (marked caption) when that differs from the name.

| No. | Name | Type | Explanation | Notes |
|---|---|---|---|---|
| 8750 | Stored Externally | Boolean | Specifies if the file has been stored in external storage. | not editable; DataClassification SystemMetadata |
| 8751 | External Upload Date | DateTime | Specifies when the file was uploaded to external storage. | not editable; DataClassification SystemMetadata |
| 8752 | External File Path | Text[2048] | Specifies the path to the file in external storage. | not editable; DataClassification CustomerContent |
| 8753 | Stored Internally | Boolean | Specifies if the file is stored in internal database storage. | not editable; DataClassification SystemMetadata |
| 8754 | Source Environment Hash | Text[32] | Specifies a hash identifying the tenant, environment, and company that originally uploaded this file to external storage. | not editable; DataClassification SystemMetadata |
| 8755 | Skip Delete On Copy | Boolean | Specifies whether to skip deletion of this attachment from external storage. | not editable; DataClassification SystemMetadata |

## Procedures

- `MarkAsNotUploadedToExternal()` (internal): Marks the document attachment as not uploaded to external storage. Clears all external storage related fields.
- `MarkAsDeletedInternally()` (internal): Marks the document attachment as deleted from internal storage. Clears the Document Reference ID and sets the stored internally flag to false.

## Relations

- extends [Table 1173 "Document Attachment"](../table/1173.md)

## Across versions

- Present in: BC29-30
- Changed (declaration) in: none

Source: AL metadata extracted from the code (names, ids, signatures, properties); no code bodies (D10).

## Ask your agent

Procedure bodies are not stored here (D10). For a procedure body or the calls of one procedure, ask bc-code-atlas (external, by Stefan Maron, MIT; default corpus w1-28), which the bc-observatory plugin connects: `bcatlas_resolve_node(object_type: "tableextension", object_name: "Document Attachment Ext.Stor.")`, then `bcatlas_get_procedure_body` or `bcatlas_get_neighbors` on the returned id.