diff --git a/CHANGELOG.md b/CHANGELOG.md
index d3d4d48d6d1..8aa29c16ee0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,6 +15,7 @@ Docs: https://docs.openclaw.ai
 - Security/Gateway + ACP: block high-risk tools (`sessions_spawn`, `sessions_send`, `gateway`, `whatsapp_login`) from HTTP `/tools/invoke` by default with `gateway.tools.{allow,deny}` overrides, and harden ACP permission selection to fail closed when tool identity/options are ambiguous while supporting `allow_always`/`reject_always`. (#15390) Thanks @aether-ai-agent.
 - MS Teams: preserve parsed mention entities/text when appending OneDrive fallback file links, and accept broader real-world Teams mention ID formats (`29:...`, `8:orgid:...`) while still rejecting placeholder patterns. (#15436) Thanks @hyojin.
 - Security/Audit: distinguish external webhooks (`hooks.enabled`) from internal hooks (`hooks.internal.enabled`) in attack-surface summaries to avoid false exposure signals when only internal hooks are enabled. (#13474) Thanks @mcaxtr.
+- Security/Onboarding: clarify multi-user DM isolation remediation with explicit `openclaw config set session.dmScope ...` commands in security audit, doctor security, and channel onboarding guidance. (#13129) Thanks @VintLin.
 - Security/Audit: add misconfiguration checks for sandbox Docker config with sandbox mode off, ineffective `gateway.nodes.denyCommands` entries, global minimal tool-profile overrides by agent profiles, and permissive extension-plugin tool reachability.
 - Auto-reply/Threading: auto-inject implicit reply threading so `replyToMode` works without requiring model-emitted `[[reply_to_current]]`, while preserving `replyToMode: "off"` behavior for implicit Slack replies and keeping block-streaming chunk coalescing stable under `replyToMode: "first"`. (#14976) Thanks @Diaspar4u.
 - Sandbox: pass configured `sandbox.docker.env` variables to sandbox containers at `docker create` time. (#15138) Thanks @stevebot-alive.
diff --git a/src/commands/doctor-security.e2e.test.ts b/src/commands/doctor-security.e2e.test.ts
index f948f2617ad..c1a37bb22f1 100644
--- a/src/commands/doctor-security.e2e.test.ts
+++ b/src/commands/doctor-security.e2e.test.ts
@@ -2,13 +2,14 @@ import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
 import type { OpenClawConfig } from "../config/config.js";
 
 const note = vi.hoisted(() => vi.fn());
+const pluginRegistry = vi.hoisted(() => ({ list: [] as any[] }));
 
 vi.mock("../terminal/note.js", () => ({
   note,
 }));
 
 vi.mock("../channels/plugins/index.js", () => ({
-  listChannelPlugins: () => [],
+  listChannelPlugins: () => pluginRegistry.list,
 }));
 
 import { noteSecurityWarnings } from "./doctor-security.js";
@@ -19,6 +20,7 @@ describe("noteSecurityWarnings gateway exposure", () => {
 
   beforeEach(() => {
     note.mockClear();
+    pluginRegistry.list = [];
     prevToken = process.env.OPENCLAW_GATEWAY_TOKEN;
     prevPassword = process.env.OPENCLAW_GATEWAY_PASSWORD;
     delete process.env.OPENCLAW_GATEWAY_TOKEN;
@@ -73,4 +75,31 @@ describe("noteSecurityWarnings gateway exposure", () => {
     expect(message).toContain("No channel security warnings detected");
     expect(message).not.toContain("Gateway bound");
   });
+
+  it("shows explicit dmScope config command for multi-user DMs", async () => {
+    pluginRegistry.list = [
+      {
+        id: "whatsapp",
+        meta: { label: "WhatsApp" },
+        config: {
+          listAccountIds: () => ["default"],
+          resolveAccount: () => ({}),
+          isEnabled: () => true,
+          isConfigured: () => true,
+        },
+        security: {
+          resolveDmPolicy: () => ({
+            policy: "allowlist",
+            allowFrom: ["alice", "bob"],
+            allowFromPath: "channels.whatsapp.",
+            approveHint: "approve",
+          }),
+        },
+      },
+    ];
+    const cfg = { session: { dmScope: "main" } } as OpenClawConfig;
+    await noteSecurityWarnings(cfg);
+    const message = lastMessage();
+    expect(message).toContain('config set session.dmScope "per-channel-peer"');
+  });
 });
diff --git a/src/commands/onboard-channels.e2e.test.ts b/src/commands/onboard-channels.e2e.test.ts
index 978b8b51507..25c1c6fc220 100644
--- a/src/commands/onboard-channels.e2e.test.ts
+++ b/src/commands/onboard-channels.e2e.test.ts
@@ -87,6 +87,48 @@ describe("setupChannels", () => {
     expect(multiselect).not.toHaveBeenCalled();
   });
 
+  it("shows explicit dmScope config command in channel primer", async () => {
+    const note = vi.fn(async () => {});
+    const select = vi.fn(async () => "__done__");
+    const multiselect = vi.fn(async () => {
+      throw new Error("unexpected multiselect");
+    });
+    const text = vi.fn(async ({ message }: { message: string }) => {
+      throw new Error(`unexpected text prompt: ${message}`);
+    });
+
+    const prompter: WizardPrompter = {
+      intro: vi.fn(async () => {}),
+      outro: vi.fn(async () => {}),
+      note,
+      select,
+      multiselect,
+      text: text as unknown as WizardPrompter["text"],
+      confirm: vi.fn(async () => false),
+      progress: vi.fn(() => ({ update: vi.fn(), stop: vi.fn() })),
+    };
+
+    const runtime: RuntimeEnv = {
+      log: vi.fn(),
+      error: vi.fn(),
+      exit: vi.fn((code: number) => {
+        throw new Error(`exit:${code}`);
+      }),
+    };
+
+    await setupChannels({} as OpenClawConfig, runtime, prompter, {
+      skipConfirm: true,
+    });
+
+    const sawPrimer = note.mock.calls.some(
+      ([message, title]) =>
+        title === "How channels work" &&
+        String(message).includes('config set session.dmScope "per-channel-peer"'),
+    );
+    expect(sawPrimer).toBe(true);
+    expect(multiselect).not.toHaveBeenCalled();
+  });
+
   it("prompts for configured channel action and skips configuration when told to skip", async () => {
     const select = vi.fn(async ({ message }: { message: string }) => {
       if (message === "Select channel (QuickStart)") {
diff --git a/src/security/audit.test.ts b/src/security/audit.test.ts
index bac80213d06..d13dbff6971 100644
--- a/src/security/audit.test.ts
+++ b/src/security/audit.test.ts
@@ -589,6 +589,7 @@ describe("security audit", () => {
         expect.objectContaining({
           checkId: "channels.whatsapp.dm.scope_main_multiuser",
           severity: "warn",
+          remediation: expect.stringContaining('config set session.dmScope "per-channel-peer"'),
         }),
       ]),
     );