diff --git a/doc/plans/2026-09-11-speko-voice-e2e-runbook.md b/doc/plans/2026-09-11-speko-voice-e2e-runbook.md
index ff6f06e3d9f..2867fd32d55 100644
--- a/doc/plans/2026-09-11-speko-voice-e2e-runbook.md
+++ b/doc/plans/2026-09-11-speko-voice-e2e-runbook.md
@@ -21,7 +21,9 @@ PSTN/interruption qualification.
 
 Private voice routes accept both local authenticated sessions and trusted Cloud
 user sessions. Cloud callers keep their authenticated user ID and current
-company scope. Board API keys, MCP OAuth callers, Cloud control credentials,
+company scope. Cloud owners use current company membership even when temporary
+Cloud administrator access is enabled; they do not need a persisted local
+instance-admin role. Board API keys, MCP OAuth callers, Cloud control credentials,
 and raw Cloud user headers do not create private caller authority.
 
 On a Cloud workspace, verify that the signed-in operator can load call history
diff --git a/server/src/__tests__/voice-session-store.integration.test.ts b/server/src/__tests__/voice-session-store.integration.test.ts
index 07cbfa2e92c..276bdb353f4 100644
--- a/server/src/__tests__/voice-session-store.integration.test.ts
+++ b/server/src/__tests__/voice-session-store.integration.test.ts
@@ -1,3 +1,7 @@
+import express from "express";
+import request from "supertest";
+import { errorHandler } from "../middleware/error-handler.js";
+import { voiceSessionRoutes } from "../routes/voice-sessions.js";
 import { issueThreadInteractionService } from "../services/issue-thread-interactions.js";
 import { readFile } from "node:fs/promises";
 import { join } from "node:path";
@@ -7,7 +11,7 @@ import { VOICE_RESULT_NOTIFICATION } from "@paperclipai/shared";
 import { createHash, createHmac, randomUUID } from "node:crypto";
 import { eq } from "drizzle-orm";
 import { afterAll, beforeAll, describe, expect, it, vi } from "vitest";
-import { chatActions, principalPermissionGrants, environments, chatVoiceInboundCalls, chatVoicePhoneLines, chatVoiceReports, heartbeatRuns, toolProfileBindings, chatVoiceCallbacks, agentWakeupRequests, issueThreadInteractions, issueQuestionResponseDeliveries, issueComments, agents, chatConversations, chatDeliveries, chatEndpoints, chatPublications, chatVoiceReplies, chatVoiceSessions, chatVoiceToolCalls, companies, companyMemberships, companySecrets, connectionGrants, connectionGrantMembers, createDb, EMBEDDED_POSTGRES_TEST_TIMEOUT_MS, issues, toolApplications, toolConnections, toolConnectionInstalls } from "@paperclipai/db";
+import { chatActions, instanceUserRoles, principalPermissionGrants, environments, chatVoiceInboundCalls, chatVoicePhoneLines, chatVoiceReports, heartbeatRuns, toolProfileBindings, chatVoiceCallbacks, agentWakeupRequests, issueThreadInteractions, issueQuestionResponseDeliveries, issueComments, agents, chatConversations, chatDeliveries, chatEndpoints, chatPublications, chatVoiceReplies, chatVoiceSessions, chatVoiceToolCalls, companies, companyMemberships, companySecrets, connectionGrants, connectionGrantMembers, createDb, EMBEDDED_POSTGRES_TEST_TIMEOUT_MS, issues, toolApplications, toolConnections, toolConnectionInstalls } from "@paperclipai/db";
 import { configureSpekoSessionTools } from "../services/voice/speko-tool-setup.js";
 import { instanceSettingsService } from "../services/instance-settings.js";
 import { chatChannelService } from "../services/chat-channels.js";
@@ -522,6 +526,34 @@ const support = await getEmbeddedPostgresTestSupport();
     return { ...f, service, transport, credentials, input };
   }
 
+  it("loads history and starts calls for Cloud owners without local admin roles, retaining membership revocation", async () => {
+    await instanceSettingsService(db).updateExperimental({ enableChatConnectors: true });
+    const f = await nativeServiceFixture();
+    await db.update(companyMemberships).set({ membershipRole: "owner" }).where(eq(companyMemberships.principalId, f.callerId));
+    expect(await db.select().from(instanceUserRoles).where(eq(instanceUserRoles.userId, f.callerId))).toEqual([]);
+    const app = express();
+    app.use(express.json());
+    app.use((req, _res, next) => {
+      req.actor = { type: "board", source: "cloud_tenant", userId: f.callerId, isInstanceAdmin: true, companyIds: [f.companyId] };
+      next();
+    });
+    app.use("/api", voiceSessionRoutes(db, f.service));
+    app.use(errorHandler);
+    const historyPath = `/api/companies/${f.companyId}/voice-history/${f.endpointId}`;
+    const history = await request(app).get(historyPath).expect(200);
+    expect(history.body).toHaveLength(1);
+    const started = await request(app).post(`/api/companies/${f.companyId}/voice-sessions`)
+      .send({ endpointId: f.endpointId, issueId: f.issueId, idempotencyKey: randomUUID() }).expect(201);
+    const [persisted] = await db.select().from(chatVoiceSessions).where(eq(chatVoiceSessions.id, started.body.session.id));
+    expect(persisted).toMatchObject({ callerId: f.callerId, callerAuthority: "member", companyId: f.companyId });
+    expect(f.transport.createBrowserSession).toHaveBeenCalledTimes(1);
+    await db.update(companyMemberships).set({ status: "removed" }).where(eq(companyMemberships.principalId, f.callerId));
+    await request(app).get(historyPath).expect(403);
+    await request(app).post(`/api/companies/${f.companyId}/voice-sessions`)
+      .send({ endpointId: f.endpointId, issueId: f.issueId, idempotencyKey: randomUUID() }).expect(403);
+    expect(f.transport.createBrowserSession).toHaveBeenCalledTimes(1);
+  });
+
   async function pushFixture() {
     await instanceSettingsService(db).updateExperimental({enableChatConnectors: true});
     const f = await nativeServiceFixture();
diff --git a/server/src/routes/voice-sessions.auth.test.ts b/server/src/routes/voice-sessions.auth.test.ts
index 4bf3f98ee09..99a9ed7a196 100644
--- a/server/src/routes/voice-sessions.auth.test.ts
+++ b/server/src/routes/voice-sessions.auth.test.ts
@@ -43,9 +43,15 @@ describe("voice caller authentication", () => {
     expect(service.start).toHaveBeenCalledWith(expect.objectContaining({ companyId, endpointId, caller: { id: actor.userId, authority: "member" } }));
   });
 
-  it("preserves authenticated Cloud instance-admin authority", async () => {
+  it("keeps Cloud owners company-scoped without a persisted local admin role", async () => {
     await request(app({ ...actor, source: "cloud_tenant", isInstanceAdmin: true }))
       .get(`/api/companies/${companyId}/voice-history/${endpointId}`).expect(200);
+    expect(service.history).toHaveBeenCalledWith(companyId, endpointId, { id: actor.userId, authority: "member" });
+  });
+
+  it("preserves local authenticated administrator authority", async () => {
+    await request(app({ ...actor, isInstanceAdmin: true }))
+      .get(`/api/companies/${companyId}/voice-history/${endpointId}`).expect(200);
     expect(service.history).toHaveBeenCalledWith(companyId, endpointId, { id: actor.userId, authority: "instance_admin" });
   });
 
diff --git a/server/src/routes/voice-sessions.ts b/server/src/routes/voice-sessions.ts
index adc49244904..add9b278395 100644
--- a/server/src/routes/voice-sessions.ts
+++ b/server/src/routes/voice-sessions.ts
@@ -14,7 +14,7 @@ function caller(req: Request): VoiceCaller {
   assertBoard(req);
   if (req.actor.source === "local_implicit") return { id: "local-board", authority: "local_board" };
   if (!req.actor.userId || !["session", "cloud_tenant"].includes(req.actor.source ?? "")) throw forbidden("Sign in to start a private voice conversation");
-  return { id: req.actor.userId, authority: req.actor.isInstanceAdmin ? "instance_admin" : "member" };
+  return { id: req.actor.userId, authority: req.actor.source === "session" && req.actor.isInstanceAdmin ? "instance_admin" : "member" };
 }
 function company(req: Request, requireAccess = true) {
   const id = req.params.companyId as string;