diff --git a/api/server/controllers/auth/oauth.js b/api/server/controllers/auth/oauth.js
index 3502be8a4c..ede02febb2 100644
--- a/api/server/controllers/auth/oauth.js
+++ b/api/server/controllers/auth/oauth.js
@@ -45,7 +45,9 @@ function createOAuthHandler(redirectUri = domains.client) {
 
         /** Get refresh token from tokenset for OpenID users */
         const refreshToken =
-          req.user.tokenset?.refresh_token || req.user.federatedTokens?.refresh_token;
+          req.user.provider === 'openid' && isEnabled(process.env.OPENID_REUSE_TOKENS) === true
+            ? req.user.tokenset?.refresh_token || req.user.federatedTokens?.refresh_token
+            : undefined;
         const expiresAt = Date.now() + sessionExpiry;
 
         const callbackUrl = new URL(redirectUri);
diff --git a/api/server/controllers/auth/oauth.spec.js b/api/server/controllers/auth/oauth.spec.js
new file mode 100644
index 0000000000..4a20442d4f
--- /dev/null
+++ b/api/server/controllers/auth/oauth.spec.js
@@ -0,0 +1,151 @@
+const mockIsEnabled = jest.fn();
+const mockGetAdminPanelUrl = jest.fn();
+const mockIsAdminPanelRedirect = jest.fn();
+const mockGenerateAdminExchangeCode = jest.fn();
+const mockSyncUserEntraGroupMemberships = jest.fn();
+const mockSetAuthTokens = jest.fn();
+const mockSetOpenIDAuthTokens = jest.fn();
+const mockGetLogStores = jest.fn();
+const mockCheckBan = jest.fn();
+const mockGenerateToken = jest.fn();
+const mockLogger = { info: jest.fn(), error: jest.fn() };
+
+jest.mock('librechat-data-provider', () => ({
+  CacheKeys: { ADMIN_OAUTH_EXCHANGE: 'admin-oauth-exchange' },
+}));
+
+jest.mock('@librechat/data-schemas', () => ({
+  logger: mockLogger,
+  DEFAULT_SESSION_EXPIRY: 60000,
+}));
+
+jest.mock('@librechat/api', () => ({
+  isEnabled: (...args) => mockIsEnabled(...args),
+  getAdminPanelUrl: (...args) => mockGetAdminPanelUrl(...args),
+  isAdminPanelRedirect: (...args) => mockIsAdminPanelRedirect(...args),
+  generateAdminExchangeCode: (...args) => mockGenerateAdminExchangeCode(...args),
+}));
+
+jest.mock('~/server/services/PermissionService', () => ({
+  syncUserEntraGroupMemberships: (...args) => mockSyncUserEntraGroupMemberships(...args),
+}));
+
+jest.mock('~/server/services/AuthService', () => ({
+  setAuthTokens: (...args) => mockSetAuthTokens(...args),
+  setOpenIDAuthTokens: (...args) => mockSetOpenIDAuthTokens(...args),
+}));
+
+jest.mock(
+  '~/cache/getLogStores',
+  () =>
+    (...args) =>
+      mockGetLogStores(...args),
+);
+
+jest.mock('~/server/middleware', () => ({
+  checkBan: (...args) => mockCheckBan(...args),
+}));
+
+jest.mock('~/models', () => ({
+  generateToken: (...args) => mockGenerateToken(...args),
+}));
+
+const { createOAuthHandler } = require('./oauth');
+
+const ORIGINAL_ENV = process.env;
+
+function buildReq(overrides = {}) {
+  return {
+    user: {
+      _id: 'user-123',
+      email: 'admin@example.com',
+      provider: 'openid',
+      tokenset: { refresh_token: 'openid-refresh-token', access_token: 'openid-access-token' },
+      federatedTokens: { refresh_token: 'federated-refresh-token' },
+    },
+    pkceChallenge: 'pkce-challenge',
+    banned: false,
+    ...overrides,
+  };
+}
+
+function buildRes() {
+  return {
+    headersSent: false,
+    redirect: jest.fn(),
+  };
+}
+
+describe('createOAuthHandler', () => {
+  beforeEach(() => {
+    jest.clearAllMocks();
+    process.env = {
+      ...ORIGINAL_ENV,
+      DOMAIN_CLIENT: 'http://localhost:3080',
+      DOMAIN_SERVER: 'http://localhost:3080',
+      OPENID_REUSE_TOKENS: 'false',
+    };
+    mockIsEnabled.mockImplementation((value) => value === 'true' || value === true);
+    mockGetAdminPanelUrl.mockReturnValue('http://admin.example.com');
+    mockIsAdminPanelRedirect.mockReturnValue(true);
+    mockGetLogStores.mockReturnValue({});
+    mockCheckBan.mockResolvedValue(undefined);
+    mockGenerateToken.mockResolvedValue('jwt-token');
+    mockGenerateAdminExchangeCode.mockResolvedValue('exchange-code');
+  });
+
+  afterAll(() => {
+    process.env = ORIGINAL_ENV;
+  });
+
+  it('omits refresh token from admin exchange when OPENID_REUSE_TOKENS is disabled', async () => {
+    const handler = createOAuthHandler('http://admin.example.com/auth/openid/callback');
+    const req = buildReq();
+    const res = buildRes();
+    const next = jest.fn();
+
+    await handler(req, res, next);
+
+    expect(mockGenerateAdminExchangeCode).toHaveBeenCalledWith(
+      {},
+      req.user,
+      'jwt-token',
+      undefined,
+      'http://admin.example.com',
+      'pkce-challenge',
+      expect.any(Number),
+    );
+    expect(res.redirect).toHaveBeenCalledWith(
+      'http://admin.example.com/auth/openid/callback?code=exchange-code',
+    );
+    expect(mockSetOpenIDAuthTokens).not.toHaveBeenCalled();
+    expect(mockSetAuthTokens).not.toHaveBeenCalled();
+    expect(next).not.toHaveBeenCalled();
+  });
+
+  it('includes refresh token in admin exchange when OPENID_REUSE_TOKENS is enabled', async () => {
+    process.env.OPENID_REUSE_TOKENS = 'true';
+    const handler = createOAuthHandler('http://admin.example.com/auth/openid/callback');
+    const req = buildReq();
+    const res = buildRes();
+    const next = jest.fn();
+
+    await handler(req, res, next);
+
+    expect(mockGenerateAdminExchangeCode).toHaveBeenCalledWith(
+      {},
+      req.user,
+      'jwt-token',
+      'openid-refresh-token',
+      'http://admin.example.com',
+      'pkce-challenge',
+      expect.any(Number),
+    );
+    expect(res.redirect).toHaveBeenCalledWith(
+      'http://admin.example.com/auth/openid/callback?code=exchange-code',
+    );
+    expect(mockSetOpenIDAuthTokens).not.toHaveBeenCalled();
+    expect(mockSetAuthTokens).not.toHaveBeenCalled();
+    expect(next).not.toHaveBeenCalled();
+  });
+});