diff --git a/scenarios/02-shared-app-account/README.md b/scenarios/02-shared-app-account/README.md
index 40d75db..ae5d4e3 100755
--- a/scenarios/02-shared-app-account/README.md
+++ b/scenarios/02-shared-app-account/README.md
@@ -6,7 +6,7 @@ Show the risk of a technical application account used by many users and how the
 
 ## What This Lab Shows
 
-Before Oracle Deep Data Security, a technical account or connection pool can query orders from every seller and region. After data grants are applied, the result depends on the persona propagated by the application.
+Before Oracle Deep Data Security, a technical account or connection pool can query orders from every seller and region. After data grants are applied, the database authorizes access based on the end-user persona, not only on the shared technical account.
 
 ## Personas
 
@@ -16,39 +16,37 @@ Before Oracle Deep Data Security, a technical account or connection pool can que
 
 ## Where To Run The Commands
 
-Run commands from the repository root:
+Run SQL scripts from the repository root. On Linux/macOS/WSL:
+
+```bash
+cd ~/DEEP-DATA-SECURITY/oracle-deep-data-security-lab
+export TNS_ADMIN=~/DEEP-DATA-SECURITY/wallet-ddslab
+```
+
+Connect as the lab administrator:
+
+```bash
+sql admin@ddslab_tunnel
+```
+
+SQLcl note: when running a script with `@file.sql`, press Enter once and wait for the output. Do not type `/` afterward, because `/` reruns the last command in the SQLcl buffer.
+
+On Windows PowerShell:
 
 ```powershell
 cd C:\Users\rodrigo\Documents\Codex\oracle-deep-data-security-lab
-```
-
-Connect to the database with SQLcl or SQL*Plus:
-
-```bash
-sql "<connect_string>"
-```
-
-Example:
-
-```text
-ADMIN/<password>@ddslab_high
+sql admin@ddslab_tunnel
 ```
 
 ## Step By Step - Before, Vulnerable Environment
 
-1. Connect to the database:
-
-   ```bash
-   sql "<connect_string>"
-   ```
-
-2. Reset the scenario:
+1. Reset the scenario as `ADMIN`:
 
    ```sql
    @scenarios/02-shared-app-account/sql/99_reset.sql
    ```
 
-3. Create the table, data, users, and technical account:
+2. Create the orders table, seed data, business personas, and the shared app account:
 
    ```sql
    @scenarios/02-shared-app-account/sql/00_schema.sql
@@ -56,34 +54,82 @@ ADMIN/<password>@ddslab_high
    @scenarios/02-shared-app-account/sql/02_identities.sql
    ```
 
-4. Simulate an application querying orders with broad SQL:
+3. Show the full raw data as `ADMIN`:
+
+   ```sql
+   SELECT order_id, customer_name, region, seller, amount, margin
+   FROM dds_orders
+   ORDER BY order_id;
+   ```
+
+4. Connect as the shared technical application account:
+
+   ```bash
+   sql 'dds_app/AppPool#2026Lab!@ddslab_tunnel'
+   ```
+
+5. Run the broad application query:
 
    ```sql
    @scenarios/02-shared-app-account/sql/04_test_queries.sql
    ```
 
-Expected result before protection: orders from multiple regions and fields such as `MARGIN` may appear to users who should not see them.
+Expected result before protection: `DDS_APP` can see orders from all regions and the sensitive `MARGIN` column. This represents a common connection-pool problem where the database only sees the application account.
 
 ## Step By Step - After, With Deep Data Security
 
-1. Apply the data grants:
+1. Reconnect as `ADMIN` and apply the data grants:
 
    ```sql
    @scenarios/02-shared-app-account/sql/03_data_grants.sql
    ```
 
-2. Run the query again:
+2. Connect as `alice`, a sales representative:
 
-   ```sql
-   @scenarios/02-shared-app-account/sql/04_test_queries.sql
+   ```bash
+   sql 'alice/Welcome1_DDS!@ddslab_tunnel'
    ```
 
-3. Repeat the test by simulating `alice` and `bruno` as end users.
+3. Run Alice's normal business query, without the sensitive `MARGIN` column:
+
+   ```sql
+   ALTER SESSION SET CURRENT_SCHEMA = ADMIN;
+
+   SELECT order_id, customer_name, region, seller, amount
+   FROM dds_orders
+   ORDER BY order_id;
+   ```
+
+   This query represents the normal sales workflow. Alice needs customer, region, seller, and order amount to follow her pipeline, but she does not need commercial margin.
+
+4. Try to access the sensitive margin column as Alice:
+
+   ```sql
+   SELECT order_id, customer_name, region, seller, amount, margin
+   FROM dds_orders
+   ORDER BY order_id;
+   ```
+
+   This query represents an application bug, abused endpoint, prompt injection, or ad hoc SQL asking for a sensitive field outside Alice's business role.
+
+5. Connect as `bruno`, the LATAM manager, and run the manager query:
+
+   ```bash
+   sql 'bruno/Welcome1_DDS!@ddslab_tunnel'
+   ```
+
+   ```sql
+   ALTER SESSION SET CURRENT_SCHEMA = ADMIN;
+
+   SELECT order_id, customer_name, region, seller, amount, margin
+   FROM dds_orders
+   ORDER BY order_id;
+   ```
 
 Expected result after protection:
 
-- `alice` sees only her orders and does not see `MARGIN`.
-- `bruno` sees LATAM orders with manager visibility.
+- `alice` sees only her orders and does not get access to `MARGIN`.
+- `bruno` sees LATAM orders with manager visibility, including `MARGIN`.
 - The technical account is no longer the only authorization boundary.
 
 ## Optional Automated Execution
@@ -103,4 +149,3 @@ Linux/macOS:
 ## Demo Details
 
 See the complete walkthrough, evidence, and official references in [RUNBOOK.md](RUNBOOK.md).
-
diff --git a/scenarios/02-shared-app-account/RUNBOOK.md b/scenarios/02-shared-app-account/RUNBOOK.md
index ad70c92..bfbeeb4 100755
--- a/scenarios/02-shared-app-account/RUNBOOK.md
+++ b/scenarios/02-shared-app-account/RUNBOOK.md
@@ -18,13 +18,27 @@ Show that a shared technical application account should not be the real data aut
 
 ## Before - Vulnerable Environment
 
-1. Reset the scenario:
+1. From the repository root, connect as `ADMIN`:
+
+   ```bash
+   cd ~/DEEP-DATA-SECURITY/oracle-deep-data-security-lab
+   export TNS_ADMIN=~/DEEP-DATA-SECURITY/wallet-ddslab
+   sql admin@ddslab_tunnel
+   ```
+
+   Presenter note: `ADMIN` prepares the lab objects. The risk will be shown later using the shared application account.
+
+   SQLcl note: after running a script with `@file.sql`, do not type `/`. The slash reruns the last command in the SQLcl buffer and can make a successful command look like an error.
+
+2. Reset the scenario:
 
    ```sql
    @scenarios/02-shared-app-account/sql/99_reset.sql
    ```
 
-2. Create the table, data, and technical account:
+   Presenter note: this makes the demo repeatable and removes previous Data Grants or roles.
+
+3. Create the table, data, and identities:
 
    ```sql
    @scenarios/02-shared-app-account/sql/00_schema.sql
@@ -32,12 +46,38 @@ Show that a shared technical application account should not be the real data aut
    @scenarios/02-shared-app-account/sql/02_identities.sql
    ```
 
-3. Simulate an application or API using the `DDS_APP` account to query all orders:
+   Presenter note: `DDS_APP` represents the application connection pool; `alice` and `bruno` represent real business users.
+
+4. Show all rows and columns as `ADMIN`:
+
+   ```sql
+   SELECT order_id, customer_name, region, seller, amount, margin
+   FROM dds_orders
+   ORDER BY order_id;
+   ```
+
+   Presenter note: `MARGIN` is commercially sensitive and should not be visible to every seller.
+
+5. Exit and connect as the shared technical application account:
+
+   ```sql
+   exit
+   ```
+
+   ```bash
+   sql 'dds_app/AppPool#2026Lab!@ddslab_tunnel'
+   ```
+
+   Presenter note: this simulates a web app, API, BI tool, or AI service where many users arrive through the same database account.
+
+6. Simulate an application or API using `DDS_APP` to query all orders:
 
    ```sql
    @scenarios/02-shared-app-account/sql/04_test_queries.sql
    ```
 
+   Presenter note: before DDS, the database sees `DDS_APP` and the broad SQL returns too much data.
+
 ## Expected Result Before
 
 - The shared account can see orders from every seller and region.
@@ -46,18 +86,74 @@ Show that a shared technical application account should not be the real data aut
 
 ## After - Applying Deep Data Security
 
-1. Apply data grants by business role:
+1. Exit and reconnect as `ADMIN`:
+
+   ```sql
+   exit
+   ```
+
+   ```bash
+   sql admin@ddslab_tunnel
+   ```
+
+2. Apply data grants by business role:
 
    ```sql
    @scenarios/02-shared-app-account/sql/03_data_grants.sql
    ```
 
-2. Run the same query in the context of `alice` and `bruno`:
+   Presenter note: `seller_role` is limited to the seller's own rows and excludes `MARGIN`; `latam_manager_role` can see LATAM orders with full manager fields.
+
+3. Test Alice, the sales representative, with a normal business query:
 
    ```sql
-   @scenarios/02-shared-app-account/sql/04_test_queries.sql
+   exit
    ```
 
+   ```bash
+   sql 'alice/Welcome1_DDS!@ddslab_tunnel'
+   ```
+
+   ```sql
+   ALTER SESSION SET CURRENT_SCHEMA = ADMIN;
+
+   SELECT order_id, customer_name, region, seller, amount
+   FROM dds_orders
+   ORDER BY order_id;
+   ```
+
+   Presenter note: this is Alice's legitimate workflow. She needs customer, region, seller, and amount to manage her pipeline, but she does not need commercial margin.
+
+4. Try to force Alice to see `MARGIN`:
+
+   ```sql
+   SELECT order_id, customer_name, region, seller, amount, margin
+   FROM dds_orders
+   ORDER BY order_id;
+   ```
+
+   Presenter note: this simulates an application bug, abused API endpoint, prompt injection, or AI-generated SQL asking for a sensitive column outside Alice's business role.
+
+5. Test Bruno, the LATAM manager:
+
+   ```sql
+   exit
+   ```
+
+   ```bash
+   sql 'bruno/Welcome1_DDS!@ddslab_tunnel'
+   ```
+
+   ```sql
+   ALTER SESSION SET CURRENT_SCHEMA = ADMIN;
+
+   SELECT order_id, customer_name, region, seller, amount, margin
+   FROM dds_orders
+   ORDER BY order_id;
+   ```
+
+   Presenter note: Bruno has manager visibility, so he can see LATAM orders and the margin needed for his role.
+
 ## Expected Result After
 
 - `alice` sees only her orders and does not see `margin`.
@@ -76,4 +172,3 @@ Show that a shared technical application account should not be the real data aut
 - Fine-Grained Data Authorization: https://docs.oracle.com/en/database/oracle/oracle-database/26/ddscg/fine-grained-data-authorization.html
 - Create Data Grants: https://docs.oracle.com/en/database/oracle/oracle-database/26/ddscg/create-data-grants.html
 - End-User Security Contexts: https://docs.oracle.com/en/database/oracle/oracle-database/26/refrn/DBA_END_USER_SECURITY_CONTEXTS.html
-
diff --git a/scenarios/02-shared-app-account/evidence/expected-results.md b/scenarios/02-shared-app-account/evidence/expected-results.md
index b9982b5..54bf387 100755
--- a/scenarios/02-shared-app-account/evidence/expected-results.md
+++ b/scenarios/02-shared-app-account/evidence/expected-results.md
@@ -1,6 +1,16 @@
 # Expected Results
 
-- `alice` sees her orders and no `margin`.
-- `bruno` sees LATAM orders with all columns.
-- The shared technical account alone is not the authorization boundary for data access.
+## Before Oracle Deep Data Security
 
+- `DDS_APP` simulates a shared application account or connection pool.
+- `DDS_APP` can query all orders from all regions.
+- `DDS_APP` can see the sensitive `margin` column.
+- The database cannot safely distinguish Alice's access from Bruno's access if the application account is the only security boundary.
+
+## After Oracle Deep Data Security
+
+- `alice` sees only her own orders.
+- `alice` can query operational columns such as `order_id`, `customer_name`, `region`, `seller`, and `amount`.
+- `alice` cannot access `margin`.
+- `bruno` sees LATAM orders with manager visibility, including `margin`.
+- The database enforces access based on the business persona, not only on the shared technical account.
diff --git a/scenarios/02-shared-app-account/sql/00_schema.sql b/scenarios/02-shared-app-account/sql/00_schema.sql
index 87ae476..f43aedc 100755
--- a/scenarios/02-shared-app-account/sql/00_schema.sql
+++ b/scenarios/02-shared-app-account/sql/00_schema.sql
@@ -1,11 +1,20 @@
 WHENEVER SQLERROR EXIT SQL.SQLCODE
 
-CREATE TABLE dds_orders (
-  order_id      NUMBER GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
-  customer_name VARCHAR2(100) NOT NULL,
-  region        VARCHAR2(30) NOT NULL,
-  seller        VARCHAR2(60) NOT NULL,
-  amount        NUMBER(12,2) NOT NULL,
-  margin        NUMBER(12,2) NOT NULL
-);
-
+BEGIN
+  EXECUTE IMMEDIATE q'[
+    CREATE TABLE dds_orders (
+      order_id      NUMBER GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
+      customer_name VARCHAR2(100) NOT NULL,
+      region        VARCHAR2(30) NOT NULL,
+      seller        VARCHAR2(60) NOT NULL,
+      amount        NUMBER(12,2) NOT NULL,
+      margin        NUMBER(12,2) NOT NULL
+    )
+  ]';
+EXCEPTION
+  WHEN OTHERS THEN
+    IF SQLCODE != -955 THEN
+      RAISE;
+    END IF;
+END;
+/
diff --git a/scenarios/02-shared-app-account/sql/02_identities.sql b/scenarios/02-shared-app-account/sql/02_identities.sql
index 2e92151..3f62004 100755
--- a/scenarios/02-shared-app-account/sql/02_identities.sql
+++ b/scenarios/02-shared-app-account/sql/02_identities.sql
@@ -14,5 +14,11 @@ GRANT shared_app_session_role TO latam_manager_role;
 GRANT DATA ROLE seller_role TO alice;
 GRANT DATA ROLE latam_manager_role TO bruno;
 
-CREATE USER dds_app IDENTIFIED BY "Welcome1_DDS_App!" ACCOUNT UNLOCK;
+CREATE USER dds_app IDENTIFIED BY "AppPool#2026Lab!" ACCOUNT UNLOCK;
 GRANT CREATE SESSION TO dds_app;
+
+-- Vulnerable baseline: this broad legacy role simulates a shared application
+-- account or connection pool that can query the full table before DDS is enforced.
+CREATE ROLE shared_app_legacy_access_role;
+GRANT SELECT ON dds_orders TO shared_app_legacy_access_role;
+GRANT shared_app_legacy_access_role TO dds_app;
diff --git a/scenarios/02-shared-app-account/sql/03_data_grants.sql b/scenarios/02-shared-app-account/sql/03_data_grants.sql
index c02d269..0b17ec3 100755
--- a/scenarios/02-shared-app-account/sql/03_data_grants.sql
+++ b/scenarios/02-shared-app-account/sql/03_data_grants.sql
@@ -3,7 +3,7 @@ WHENEVER SQLERROR EXIT SQL.SQLCODE
 CREATE OR REPLACE DATA GRANT seller_own_orders
   AS SELECT (order_id, customer_name, region, seller, amount)
   ON dds_orders
-  WHERE seller = ORA_END_USER_CONTEXT.username
+  WHERE UPPER(seller) = ORA_END_USER_CONTEXT.username
   TO seller_role;
 
 CREATE OR REPLACE DATA GRANT latam_manager_orders
diff --git a/scenarios/02-shared-app-account/sql/99_reset.sql b/scenarios/02-shared-app-account/sql/99_reset.sql
index cb2ca6a..ae2c858 100755
--- a/scenarios/02-shared-app-account/sql/99_reset.sql
+++ b/scenarios/02-shared-app-account/sql/99_reset.sql
@@ -14,6 +14,8 @@ BEGIN EXECUTE IMMEDIATE 'DROP DATA ROLE latam_manager_role'; EXCEPTION WHEN OTHE
 /
 BEGIN EXECUTE IMMEDIATE 'DROP ROLE shared_app_session_role'; EXCEPTION WHEN OTHERS THEN NULL; END;
 /
+BEGIN EXECUTE IMMEDIATE 'DROP ROLE shared_app_legacy_access_role'; EXCEPTION WHEN OTHERS THEN NULL; END;
+/
 BEGIN EXECUTE IMMEDIATE 'DROP END USER alice'; EXCEPTION WHEN OTHERS THEN NULL; END;
 /
 BEGIN EXECUTE IMMEDIATE 'DROP END USER bruno'; EXCEPTION WHEN OTHERS THEN NULL; END;