diff --git a/CHANGELOG.md b/CHANGELOG.md
index c65fb463637..e4aa91230d8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -56,6 +56,7 @@ Docs: https://docs.openclaw.ai
 - OpenAI Codex: surface browser OAuth and device-code login failures instead of treating failed logins as empty successful auth results. Refs #80363.
 - CLI agents: carry runtime-only current-turn sender/reply context into CLI model prompts while keeping prompt-build hook input and transcript text clean.
 - Control UI: keep workspace file presence checks from treating `fs-safe` stat helper failures as missing files, restoring Agents file status for existing Windows workspace files. Fixes #79953. Thanks @lovelefeng-glitch.
+- Microsoft Foundry: report an explicit error when the Azure subscription prompt returns an id that is not present in the enabled subscription list, instead of continuing from an unsafe subscription assertion. (#62742) Thanks @oliviareid-svg.
 - fix(matrix): gate name-based allowlist resolution [AI]. (#79007) Thanks @pgondhi987.
 - Slack: include the bot's own root/parent message in new thread sessions so in-thread replies reach the agent with the parent text the user is responding to, instead of only `reply_to_id` metadata. Fixes #79338. Thanks @sxxtony.
 - Docker: keep image builds on the source pnpm workspace policy so pnpm 11 can prune production dependencies without a Docker-only workspace rewrite.
diff --git a/extensions/microsoft-foundry/auth.ts b/extensions/microsoft-foundry/auth.ts
index b58f6011403..691a6dde7e2 100644
--- a/extensions/microsoft-foundry/auth.ts
+++ b/extensions/microsoft-foundry/auth.ts
@@ -98,7 +98,11 @@ export const entraIdAuthMethod: ProviderAuthMethod = {
           label: `${sub.name} (${sub.id})`,
         })),
       });
-      selectedSub = subs.find((sub) => sub.id === selectedId)!;
+      const match = subs.find((sub) => sub.id === selectedId);
+      if (!match) {
+        throw new Error(`Selected subscription not found: ${selectedId}`);
+      }
+      selectedSub = match;
       tenantId ??= selectedSub.tenantId;
     }
 
diff --git a/extensions/microsoft-foundry/index.test.ts b/extensions/microsoft-foundry/index.test.ts
index 6672da44e59..5f40df1fb6a 100644
--- a/extensions/microsoft-foundry/index.test.ts
+++ b/extensions/microsoft-foundry/index.test.ts
@@ -306,6 +306,56 @@ describe("microsoft-foundry plugin", () => {
     expect(config.auth?.order?.["microsoft-foundry"]).toEqual(["microsoft-foundry:default"]);
   });
 
+  it("fails clearly when the selected Azure subscription is not in the enabled list", async () => {
+    const provider = registerProvider();
+    execFileSyncMock.mockImplementation((_file: string, args: string[]) => {
+      const command = args.join(" ");
+      if (command === "version --output none") {
+        return "";
+      }
+      if (command === "account show --output json") {
+        return JSON.stringify({
+          id: "sub-one",
+          name: "Subscription One",
+          tenantId: "tenant-one",
+          state: "Enabled",
+          user: { name: "user@example.com" },
+        });
+      }
+      if (command === "account list --output json --all") {
+        return JSON.stringify([
+          {
+            id: "sub-one",
+            name: "Subscription One",
+            tenantId: "tenant-one",
+            state: "Enabled",
+          },
+          {
+            id: "sub-two",
+            name: "Subscription Two",
+            tenantId: "tenant-one",
+            state: "Enabled",
+          },
+        ]);
+      }
+      throw new Error(`unexpected az command: ${command}`);
+    });
+    const entraAuth = provider.auth.find((method: { id: string }) => method.id === "entra-id");
+
+    await expect(
+      entraAuth?.run({
+        config: {},
+        agentDir: defaultFoundryAgentDir,
+        opts: {},
+        prompter: {
+          confirm: vi.fn(async () => true),
+          select: vi.fn(async () => "missing-subscription"),
+          note: vi.fn(async () => undefined),
+        },
+      } as never),
+    ).rejects.toThrow("Selected subscription not found: missing-subscription");
+  });
+
   it("preserves the model-derived base URL for Entra runtime auth refresh", async () => {
     const provider = registerProvider();
     const prepareRuntimeAuth = requirePrepareRuntimeAuth(provider);