diff --git a/.env b/.env
index 0556efc762..a37fe0465c 100644
--- a/.env
+++ b/.env
@@ -13,6 +13,7 @@ ORDER_HISTORY_URL=null
 REFRESH_ACCESS_TOKEN_ENDPOINT=null
 SEGMENT_KEY=''
 SITE_NAME=null
+TPA_UNLINKED_ACCOUNT_PROVISION_URL=null
 INFO_EMAIL=''
 # ***** Cookies *****
 REGISTER_CONVERSION_COOKIE_NAME=null
diff --git a/src/config/index.js b/src/config/index.js
index bdfdf0ff9e..bc8a126a89 100644
--- a/src/config/index.js
+++ b/src/config/index.js
@@ -19,6 +19,7 @@ const configuration = {
   PRIVACY_POLICY: process.env.PRIVACY_POLICY || null,
   TOS_AND_HONOR_CODE: process.env.TOS_AND_HONOR_CODE || null,
   TOS_LINK: process.env.TOS_LINK || null,
+  TPA_UNLINKED_ACCOUNT_PROVISION_URL: process.env.TPA_UNLINKED_ACCOUNT_PROVISION_URL || null,
   // Miscellaneous
   GENERAL_RECOMMENDATIONS: process.env.GENERAL_RECOMMENDATIONS || '[]',
   INFO_EMAIL: process.env.INFO_EMAIL || '',
diff --git a/src/login/LoginPage.jsx b/src/login/LoginPage.jsx
index b522f2174e..6352e7f7bb 100644
--- a/src/login/LoginPage.jsx
+++ b/src/login/LoginPage.jsx
@@ -321,6 +321,18 @@ class LoginPage extends React.Component {
     } = this.props;
     const { currentProvider, providers, secondaryProviders } = this.props.thirdPartyAuthContext;
 
+    const unlinkedProvisionUrl = getConfig().TPA_UNLINKED_ACCOUNT_PROVISION_URL;
+
+    /**
+     * When currentProvider exists and we are in a login page, it is
+     * because the third-party authenticated account is not linked.
+     * See also ThirdPartyAuthAlert.jsx.
+     */
+    if (currentProvider && unlinkedProvisionUrl) {
+      window.location.href = unlinkedProvisionUrl;
+      return null;
+    }
+
     if (this.tpaHint) {
       if (thirdPartyAuthApiStatus === PENDING_STATE) {
         return <Skeleton height={36} />;
diff --git a/src/login/tests/LoginPage.test.jsx b/src/login/tests/LoginPage.test.jsx
index 4a1acdef60..bff876a1ce 100644
--- a/src/login/tests/LoginPage.test.jsx
+++ b/src/login/tests/LoginPage.test.jsx
@@ -791,4 +791,25 @@ describe('LoginPage', () => {
 
     expect(store.dispatch).toHaveBeenCalledWith(loginRemovePasswordResetBanner());
   });
+
+  it('should redirect to provisioning URL on unlinked third-party auth account', () => {
+    mergeConfig({
+      TPA_UNLINKED_ACCOUNT_PROVISION_URL: 'http://example.com',
+    });
+
+    store = mockStore({
+      ...initialState,
+      commonComponents: {
+        ...initialState.commonComponents,
+        thirdPartyAuthContext: {
+          ...initialState.commonComponents.thirdPartyAuthContext,
+          currentProvider: ssoProvider.name,
+        },
+      },
+    });
+
+    const loginPage = mount(reduxWrapper(<IntlLoginPage {...props} />));
+    expect(window.location.href).toEqual('http://example.com');
+    loginPage.unmount();
+  });
 });