diff --git a/frontend/index.html b/frontend/index.html
index f0e76c5..06432f8 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -806,6 +806,14 @@
           </div>
           <div id="app-pw-list"></div>
 
+          <!-- Single sign-on: hidden unless the server has a provider or the
+               account already holds a linked identity. -->
+          <div id="sso-section" class="hidden">
+            <h4 class="panel-title" style="margin-top:24px" data-i18n="sso_link_title">Single Sign-On</h4>
+            <p class="panel-desc" data-i18n="sso_link_desc">Verknüpfte Konten, mit denen du dich ohne Passwort anmelden kannst.</p>
+            <div id="sso-identity-list"></div>
+          </div>
+
           <h4 class="panel-title" style="margin-top:24px" data-i18n="settings_privacy">Privatsphäre</h4>
           <p class="panel-desc" data-i18n="settings_private_visibility_desc">Wie private Termine für andere Gruppenmitglieder erscheinen</p>
           <div class="form-group">
diff --git a/frontend/js/calendar.js b/frontend/js/calendar.js
index 9ef4e9a..41f62bb 100644
--- a/frontend/js/calendar.js
+++ b/frontend/js/calendar.js
@@ -3398,6 +3398,7 @@ function populateSettings() {
     if (dh) dh.checked = !!p.directory_hidden;
   }).catch(() => {});
   initAppPasswords();
+  initSSOIdentities();
 
   // Show users nav button only for admins
   const user = JSON.parse(localStorage.getItem('user') || '{}');
@@ -4940,6 +4941,64 @@ function bindProfileModal() {
   };
 }
 
+// ── Linked SSO accounts — lives in Settings → Profile ──
+async function initSSOIdentities() {
+  const section = document.getElementById('sso-section');
+  const list = document.getElementById('sso-identity-list');
+  if (!section || !list) return;
+
+  let data;
+  try {
+    data = await api.oidcIdentities();
+  } catch (e) {
+    section.classList.add('hidden');
+    return;
+  }
+  if (!data) return;
+
+  const identities = data.identities || [];
+  // An SSO-provisioned account cannot fall back to a password, so its last
+  // link must stay — otherwise the user locks themselves out for good.
+  const isSSOOnly = data.auth_source === 'sso';
+
+  if (!identities.length) {
+    // Nothing linked: only worth showing if SSO is available at all.
+    let enabled = false;
+    try {
+      const cfg = await api.oidcProviders();
+      enabled = !!(cfg && cfg.enabled);
+    } catch (e) { /* treat as unavailable */ }
+    if (!enabled) { section.classList.add('hidden'); return; }
+    list.innerHTML = `<p class="text-muted">${t('sso_none_linked')}</p>`;
+    section.classList.remove('hidden');
+    return;
+  }
+
+  list.innerHTML = identities.map(i => `<div class="app-pw-item">
+      <span class="app-pw-name">${escHtml(i.name || i.provider)}</span>
+      <span class="app-pw-meta">${i.email ? escHtml(i.email) + ' · ' : ''}${
+        i.last_login_at
+          ? t('sso_last_login') + ' ' + new Date(i.last_login_at).toLocaleDateString(getLocale())
+          : t('sso_never_used')}</span>
+      <button class="btn btn-ghost btn-sm sso-unlink" data-id="${i.id}"
+        ${isSSOOnly && identities.length === 1 ? 'disabled title="' + escHtml(t('sso_last_identity_hint')) + '"' : ''}
+        >${t('sso_unlink')}</button>
+    </div>`).join('');
+  section.classList.remove('hidden');
+
+  list.querySelectorAll('.sso-unlink').forEach(btn => {
+    btn.onclick = async () => {
+      try {
+        await api.oidcUnlink(btn.dataset.id);
+        showToast(t('sso_unlinked'));
+        initSSOIdentities();
+      } catch (e) {
+        showToast(e.message === 'oidc_last_identity' ? t('sso_last_identity_hint') : e.message, true);
+      }
+    };
+  });
+}
+
 // ── App passwords (CalDAV) — lives in Settings → Profile ──
 function initAppPasswords() {
   const appPwList = document.getElementById('app-pw-list');
diff --git a/frontend/js/i18n.js b/frontend/js/i18n.js
index d500c72..d00b716 100644
--- a/frontend/js/i18n.js
+++ b/frontend/js/i18n.js
@@ -39,6 +39,12 @@ const translations = {
     sso_err_discovery_failed: 'Anmeldedienst antwortet nicht korrekt',
     sso_err_setup_required: 'Bitte zuerst das Administrator-Konto einrichten',
     sso_link_title: 'Single Sign-On',
+    sso_link_desc: 'Verknüpfte Konten, mit denen du dich ohne Passwort anmelden kannst.',
+    sso_none_linked: 'Noch kein Konto verknüpft. Melde dich einmal über den SSO-Knopf auf der Anmeldeseite an.',
+    sso_last_login: 'Zuletzt',
+    sso_never_used: 'Noch nicht benutzt',
+    sso_unlinked: 'Verknüpfung aufgehoben',
+    sso_last_identity_hint: 'Letzte Verknüpfung — dieses Konto hat kein Passwort und wäre danach nicht mehr erreichbar.',
     sso_unlink: 'Verknüpfung aufheben',
 
     // Topbar
@@ -846,6 +852,12 @@ const translations = {
     sso_err_discovery_failed: 'Sign-in service returned an invalid response',
     sso_err_setup_required: 'Please set up the administrator account first',
     sso_link_title: 'Single sign-on',
+    sso_link_desc: 'Linked accounts you can sign in with, without a password.',
+    sso_none_linked: 'No account linked yet. Sign in once via the SSO button on the login screen.',
+    sso_last_login: 'Last used',
+    sso_never_used: 'Not used yet',
+    sso_unlinked: 'Link removed',
+    sso_last_identity_hint: 'Last link — this account has no password and would become unreachable.',
     sso_unlink: 'Unlink',
 
     // Topbar
diff --git a/frontend/js/version.js b/frontend/js/version.js
index c8e2cb0..d8186c2 100644
--- a/frontend/js/version.js
+++ b/frontend/js/version.js
@@ -1,2 +1,2 @@
 // Increment APP_VERSION with every code change
-export const APP_VERSION = 'v92';
+export const APP_VERSION = 'v93';
diff --git a/frontend/sw.js b/frontend/sw.js
index 836c5d7..6c3e4c4 100644
--- a/frontend/sw.js
+++ b/frontend/sw.js
@@ -7,7 +7,7 @@
 // the entry HTML / version files). New releases take effect on the next
 // reload, no manual SW unregister required.
 
-const CACHE_VERSION  = 'calendarr-v38';
+const CACHE_VERSION  = 'calendarr-v39';
 const OFFLINE_SHELL  = ['/', '/index.html'];
 
 self.addEventListener('install', event => {