---
id: object/pageextension/9866
type: object
title: Page extension 9866 "Sec. Group Members Drilldown"
summary: Page extension 9866 "Sec. Group Members Drilldown" in Base Application (System.Security.AccessControl), extends "Security Group Members Part". Present since at least BC23, still in BC30.
tier: official
language: en
tags:
  - pageextension
  - base application
versions:
  introduced: null
  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: 2fe92605eacafd72901e3b7c44f5400e7b9f4d438c823caddfd7e1021d5ee6a9
evidence:
  - kind: code
    url: https://github.com/microsoft/BCApps/blob/ea08af5ef2d6a9b5c5af4a029288abbe2c883220/src/Layers/W1/BaseApp/System/SecurityGroups/SecGroupMembersDrilldown.PageExt.al
    title: src/Layers/W1/BaseApp/System/SecurityGroups/SecGroupMembersDrilldown.PageExt.al (releases/29.x)
    date: null
    commit: ea08af5ef2d6a9b5c5af4a029288abbe2c883220
    t: null
    quote: null
links:
  learn: []
  objects:
    - object/page/9866
  features: []
  topics: []
  localizations: []
  videos: []
  posts: []
  guidelines: []
object_type: pageextension
object_id: 9866
name: Sec. Group Members Drilldown
namespace: System.Security.AccessControl
app: Base Application
extends: Security Group Members Part
first_version: "23"
last_version: "30"
present_in:
  - "23"
  - "24"
  - "25"
  - "26"
  - "27"
  - "28"
  - "29"
  - "30"
changed_in: []
source_major: "29"
obsolete: null
countries: []
ms_search_form_ids: []
counts:
  fields: 0
  procedures: 0
  events: 0
  subscribers: 0
  controls: 1
  actions: 0
relations:
  out: 1
  referenced_by: 0
  pages: 0
  extended_by: 0
  event_subscribers: 0
  calls: 0
  called_by: 0
  implements: 0
---

# Page extension 9866 "Sec. Group Members Drilldown"

> Page extension 9866 "Sec. Group Members Drilldown" in Base Application (System.Security.AccessControl), extends "Security Group Members Part". Present since at least BC23, still in BC30.

Base Application · System.Security.AccessControl · BC23-30 · [source at ea08af5e](https://github.com/microsoft/BCApps/blob/ea08af5ef2d6a9b5c5af4a029288abbe2c883220/src/Layers/W1/BaseApp/System/SecurityGroups/SecGroupMembersDrilldown.PageExt.al) · facts from BC29

Extends [Security Group Members Part](../page/9866.md).

## Fields on this page

Layout controls in source order, grouped by the container they sit in. Shows: the table field a control is bound to (or its expression as written); ToolTip: the control's own, else the bound field's (marked).

| Group | Control | Shows | ToolTip |
|---|---|---|---|
| modify(User Name) | User Name | modifies `User Name` | — |

## Relations

- extends [Page 9866 "Security Group Members Part"](../page/9866.md)

## Across versions

- Present in: BC23-30
- 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: "pageextension", object_name: "Sec. Group Members Drilldown")`, then `bcatlas_get_procedure_body` or `bcatlas_get_neighbors` on the returned id.