diff --git a/apps/portal/components/CustomerModeBanner.vue b/apps/portal/components/CustomerModeBanner.vue
index bebb182..69ebe5b 100644
--- a/apps/portal/components/CustomerModeBanner.vue
+++ b/apps/portal/components/CustomerModeBanner.vue
@@ -3,13 +3,22 @@
 // specific customer org. Distinct color (indigo — partner mode is normal
 // operating mode, not danger). Persistent until partner exits.
 
-import { customers } from '~/data/customers'
+import type { PartnerTenantDoc } from '~/types/partner'
 
 const partnerMode = usePartnerMode()
 const router = useRouter()
+const { partner, isPartnerStaff } = useMe()
+
+// Real tenant list (shared key; gated to partner-staff so the layout-level
+// banner doesn't 403 the partner endpoint for other users).
+const { data: tenants } = useFetch<PartnerTenantDoc[]>('/api/partner/tenants', {
+  key: 'partner-tenants',
+  default: () => [],
+  immediate: isPartnerStaff.value,
+})
 
 const activeCustomer = computed(() =>
-  customers.find((c) => c.id === partnerMode.activeCustomerId.value) || null,
+  (tenants.value ?? []).find((c) => c._id === partnerMode.activeCustomerId.value) || null,
 )
 
 onMounted(() => partnerMode.hydrate())
@@ -25,7 +34,7 @@ function exit() {
     <span class="dot" />
     <div class="meta">
       <Mono>Partner view</Mono>
-      <span class="text">managing <strong>{{ activeCustomer.name }}</strong> · actions are attributed to NordicMSP in the customer's audit log</span>
+      <span class="text">managing <strong>{{ activeCustomer.name }}</strong> · actions are attributed to {{ partner?.name ?? 'your partner org' }} in the customer's audit log</span>
     </div>
     <button class="exit" @click="exit">
       <UiIcon name="logout" :size="12" />
diff --git a/apps/portal/components/PortalSidebar.vue b/apps/portal/components/PortalSidebar.vue
index ca90802..f0e74af 100644
--- a/apps/portal/components/PortalSidebar.vue
+++ b/apps/portal/components/PortalSidebar.vue
@@ -14,7 +14,7 @@
 // source design.
 
 import type { IconName } from './UiIcon.vue'
-import { customers as fixtureCustomers } from '~/data/customers'
+import type { PartnerTenantDoc } from '~/types/partner'
 
 interface NavItem {
   id: string
@@ -130,11 +130,6 @@ const currentId = computed(() => {
   return ''
 })
 
-// Customer currently being acted-as (partner-in-customer mode)
-const activeCustomer = computed(() =>
-  fixtureCustomers.find((c) => c.id === partnerMode.activeCustomerId.value) || null,
-)
-
 // Workspace-switcher content matches the URL section.
 type SwitcherKind = 'customer' | 'partner' | 'in-customer'
 const switcherKind = computed<SwitcherKind>(() => {
@@ -154,12 +149,18 @@ function exitCustomer() {
 // hitting a 403 against the partner-scoped endpoint. useFetch with a stable
 // key dedupes with the /partner/customers page's request.
 const { partner, isPartnerStaff } = useMe()
-const { data: partnerTenants } = await useFetch<unknown[]>('/api/partner/tenants', {
+const { data: partnerTenants } = await useFetch<PartnerTenantDoc[]>('/api/partner/tenants', {
   key: 'partner-tenants',
   default: () => [],
   immediate: isPartnerStaff.value,
 })
 const partnerCustomerCount = computed(() => partnerTenants.value?.length ?? 0)
+
+// Customer currently being acted-as (partner-in-customer mode), resolved from
+// the real tenant list by the _id stored in partner mode.
+const activeCustomer = computed(() =>
+  (partnerTenants.value ?? []).find((c) => c._id === partnerMode.activeCustomerId.value) || null,
+)
 </script>
 
 <template>
@@ -193,7 +194,7 @@ const partnerCustomerCount = computed(() => partnerTenants.value?.length ?? 0)
         <span class="ws-tile" :style="{ background: activeCustomer?.brandColor || '#0A0A0A' }" />
         <div v-if="!collapsed" class="ws-text">
           <div class="ws-name">{{ activeCustomer?.name }}</div>
-          <div class="ws-sub mono">via NordicMSP</div>
+          <div class="ws-sub mono">via {{ partner?.name ?? 'partner' }}</div>
         </div>
       </template>
 
diff --git a/apps/portal/components/PortalTopbar.vue b/apps/portal/components/PortalTopbar.vue
index 12551ff..489c958 100644
--- a/apps/portal/components/PortalTopbar.vue
+++ b/apps/portal/components/PortalTopbar.vue
@@ -2,13 +2,25 @@
 // Portal topbar: workspace label, optional org switcher (partner admins), global
 // search, app launcher, notifications, profile menu.
 
-import { customers } from '~/data/customers'
+import type { PartnerTenantDoc } from '~/types/partner'
 
 const launcher = useAppLauncher()
 const drawer = useNotificationDrawer()
 const partnerMode = usePartnerMode()
 const router = useRouter()
 const route = useRoute()
+const { partner, isPartnerStaff } = useMe()
+
+// Real customer tenants drive the org switcher. Shared 'partner-tenants' key
+// dedupes with the sidebar + customers page; gated to partner-staff so the
+// global shell doesn't 403 the partner-scoped endpoint for end-users/admins.
+const { data: tenants } = useFetch<PartnerTenantDoc[]>('/api/partner/tenants', {
+  key: 'partner-tenants',
+  default: () => [],
+  immediate: isPartnerStaff.value,
+})
+const PLAN_LABEL: Record<string, string> = { mvp: 'Starter', pro: 'Business', enterprise: 'Enterprise' }
+const partnerLabel = computed(() => partner.value?.name ?? 'Partner')
 
 // Section context is URL-driven (same rule as the sidebar). The org switcher
 // only appears in the partner section or when acting-as a customer.
@@ -24,7 +36,7 @@ const showOrgSwitcher = computed(() =>
 )
 
 const activeCustomer = computed(() =>
-  customers.find((c) => c.id === partnerMode.activeCustomerId.value) || null,
+  (tenants.value ?? []).find((c) => c._id === partnerMode.activeCustomerId.value) || null,
 )
 
 const orgSwitcherOpen = ref(false)
@@ -57,7 +69,7 @@ const searchValue = ref('')
       >
         {{ (activeCustomer?.name || 'NordicMSP').slice(0, 1) }}
       </span>
-      <span class="org-name">{{ activeCustomer?.name || 'NordicMSP · Partner view' }}</span>
+      <span class="org-name">{{ activeCustomer?.name || `${partnerLabel} · Partner view` }}</span>
       <UiIcon name="chevDown" :size="12" />
     </button>
 
@@ -89,10 +101,10 @@ const searchValue = ref('')
       <div v-if="orgSwitcherOpen" class="org-drop-scrim" @click="orgSwitcherOpen = false" />
       <div v-if="orgSwitcherOpen" class="org-drop">
         <div class="org-drop-head">
-          <Eyebrow>NordicMSP · {{ customers.length }} customers</Eyebrow>
+          <Eyebrow>{{ partnerLabel }} · {{ (tenants?.length ?? 0) }} customers</Eyebrow>
         </div>
         <button class="org-drop-row" :class="{ on: !partnerMode.isActive.value }" @click="leaveCustomerMode">
-          <span class="org-drop-chip" style="background: #0A0A0A">N</span>
+          <span class="org-drop-chip" style="background: #0A0A0A">{{ partnerLabel.charAt(0).toUpperCase() }}</span>
           <div class="org-drop-meta">
             <div class="org-drop-name">Partner view</div>
             <Mono dim>portfolio overview</Mono>
@@ -100,16 +112,16 @@ const searchValue = ref('')
         </button>
         <div class="org-drop-divider" />
         <button
-          v-for="c in customers"
-          :key="c.id"
+          v-for="c in tenants"
+          :key="c._id"
           class="org-drop-row"
-          :class="{ on: partnerMode.activeCustomerId.value === c.id }"
-          @click="pickCustomer(c.id)"
+          :class="{ on: partnerMode.activeCustomerId.value === c._id }"
+          @click="pickCustomer(c._id)"
         >
-          <span class="org-drop-chip" :style="{ background: c.brandColor }">{{ c.name.slice(0, 1) }}</span>
+          <span class="org-drop-chip" :style="{ background: c.brandColor || '#0A0A0A' }">{{ c.name.slice(0, 1) }}</span>
           <div class="org-drop-meta">
             <div class="org-drop-name">{{ c.name }}</div>
-            <Mono dim>{{ c.domain }} · {{ c.plan }}</Mono>
+            <Mono dim>{{ c.domains?.[0] || c.slug }} · {{ PLAN_LABEL[c.plan ?? 'pro'] }}</Mono>
           </div>
         </button>
       </div>
diff --git a/apps/portal/components/partner/InviteTeammateModal.vue b/apps/portal/components/partner/InviteTeammateModal.vue
index 1a15dba..b817951 100644
--- a/apps/portal/components/partner/InviteTeammateModal.vue
+++ b/apps/portal/components/partner/InviteTeammateModal.vue
@@ -3,7 +3,8 @@
 // scoping + require-MFA toggle + optional personal note. Invitations expire
 // after 7 days — the design surfaces that explicitly.
 
-import { customers } from '~/data/customers'
+const { tenants } = usePartnerTenants()
+const PLAN_LABEL: Record<string, string> = { mvp: 'Starter', pro: 'Business', enterprise: 'Enterprise' }
 
 defineProps<{ open: boolean }>()
 const emit = defineEmits<{
@@ -115,18 +116,18 @@ function planBadgeTone(p: string) {
 
         <div v-if="access === 'specific'" class="picker">
           <div class="picker-head">
-            <Mono dim>{{ specific.length }} of {{ customers.length }} selected</Mono>
+            <Mono dim>{{ specific.length }} of {{ tenants.length }} selected</Mono>
           </div>
           <div class="picker-list">
-            <label v-for="c in customers" :key="c.id" class="picker-row">
+            <label v-for="c in tenants" :key="c._id" class="picker-row">
               <input
                 type="checkbox"
-                :checked="specific.includes(c.id)"
-                @change="toggleCustomer(c.id)"
+                :checked="specific.includes(c.slug)"
+                @change="toggleCustomer(c.slug)"
               />
-              <div class="cust-swatch" :style="{ background: c.brandColor }" />
+              <div class="cust-swatch" :style="{ background: c.brandColor || '#0A0A0A' }" />
               <span class="cust-name">{{ c.name }}</span>
-              <Badge :tone="planBadgeTone(c.plan)">{{ c.planLabel }}</Badge>
+              <Badge :tone="planBadgeTone(c.plan ?? 'pro')">{{ PLAN_LABEL[c.plan ?? 'pro'] }}</Badge>
             </label>
           </div>
         </div>
diff --git a/apps/portal/components/partner/TeammatePanel.vue b/apps/portal/components/partner/TeammatePanel.vue
index 8d3cc1c..1ee547a 100644
--- a/apps/portal/components/partner/TeammatePanel.vue
+++ b/apps/portal/components/partner/TeammatePanel.vue
@@ -4,7 +4,8 @@
 //   • Activity      — last 5 partner actions with timestamps + IPs
 //   • Security      — MFA card, active sessions, API tokens, suspend callout
 
-import { customers } from '~/data/customers'
+const { tenants } = usePartnerTenants()
+const PLAN_LABEL: Record<string, string> = { mvp: 'Starter', pro: 'Business', enterprise: 'Enterprise' }
 
 export interface TeamMember {
   id: string
@@ -59,10 +60,10 @@ const isOwner = computed(() => !!props.member?.isOwner)
 
 const accessText = computed(() => {
   if (!props.member) return ''
-  if (props.member.access === 'all') return `all (${customers.length})`
+  const total = tenants.value?.length ?? 0
+  if (props.member.access === 'all') return `all (${total})`
   if (props.member.access === 'none') return 'no access'
-  // Specific: just say first N customers
-  return `${customers.length - 5} of ${customers.length}`
+  return `${props.member.accessCount ?? 0} of ${total}`
 })
 </script>
 
@@ -131,14 +132,14 @@ const accessText = computed(() => {
           </div>
           <div class="ac-list">
             <div
-              v-for="c in customers.slice(0, member.access === 'all' ? customers.length : 3)"
-              :key="c.id"
+              v-for="c in tenants.slice(0, member.access === 'all' ? tenants.length : 3)"
+              :key="c._id"
               class="ac-row"
             >
               <UiIcon name="check" :size="11" :stroke-width="2.5" />
-              <div class="cust-swatch" :style="{ background: c.brandColor }" />
+              <div class="cust-swatch" :style="{ background: c.brandColor || '#0A0A0A' }" />
               <span class="cust-name">{{ c.name }}</span>
-              <Mono dim>{{ c.planLabel }}</Mono>
+              <Mono dim>{{ PLAN_LABEL[c.plan ?? 'pro'] }}</Mono>
             </div>
           </div>
         </div>
diff --git a/apps/portal/composables/usePartnerMode.ts b/apps/portal/composables/usePartnerMode.ts
index 3cfac08..c955c9c 100644
--- a/apps/portal/composables/usePartnerMode.ts
+++ b/apps/portal/composables/usePartnerMode.ts
@@ -4,9 +4,8 @@
 //
 // In real use, every action while in this mode is logged with the partner's
 // identity (not the customer's) — the design spec is explicit about this for
-// trust. For the prototype we just hold the customer id.
-
-import type { CustomerOrg } from '~/types/partner'
+// trust. We hold the active customer's tenant _id (the same key the customers
+// page passes to enter()); consumers resolve it against the real tenant list.
 
 const activeCustomerId = ref<string | null>(null)
 
@@ -34,8 +33,5 @@ export const usePartnerMode = () => {
     enter,
     exit,
     hydrate,
-    setCustomer: (c: CustomerOrg | null) => {
-      activeCustomerId.value = c?.id ?? null
-    },
   }
 }
diff --git a/apps/portal/data/customers.ts b/apps/portal/data/customers.ts
index 860dc35..6efd918 100644
--- a/apps/portal/data/customers.ts
+++ b/apps/portal/data/customers.ts
@@ -1,10 +1,7 @@
-// Partner-admin portfolio fixtures. The partner (NordicMSP) manages 8 customer
-// orgs. Numbers seeded to match partner-screens.jsx (the canonical design
-// source) line for line: same customer set, same MRR, seats, status, mark.
-
-// Types moved to ~/types/partner so the fixture *data* below can be deleted
-// page-by-page (as each goes real) without breaking type-only importers.
-import type { CustomerOrg } from '~/types/partner'
+// Remaining partner fixtures. `partner` (dashboard fallback identity) and
+// `partnerMrrSparkline` (decorative dashboard/reports sparkline) are the last
+// two holdouts — kept until the dashboard partner header and a real historical
+// MRR series replace them. The customer list now comes from /api/partner/tenants.
 
 export const partner = {
   id: 'p-nordicmsp',
@@ -18,19 +15,6 @@ export const partner = {
   founded: '2024',
 }
 
-// Customer set mirrors partner-screens.jsx line 16-25 exactly.
-// Health values derived from status + seat utilization (lower for past-due / attention).
-export const customers: CustomerOrg[] = [
-  { id: 'c-acme',      name: 'Acme Workspace',       domain: 'acme.dk',         plan: 'business',   planLabel: 'Business',   seats: { used: 24,  total: 50  }, health: 88, status: 'healthy',   mrrDkk: 4840,  brandColor: '#3F6BFF', industry: 'SaaS',          createdOn: '2026-02-04', since: 'Feb 2026' },
-  { id: 'c-bygherre',  name: 'Bygherre Cloud',       domain: 'bygherre.dk',     plan: 'business',   planLabel: 'Business',   seats: { used: 12,  total: 15  }, health: 38, status: 'past_due',  mrrDkk: 2940,  brandColor: '#E89A1F', industry: 'Construction',  createdOn: '2026-03-12', since: 'Mar 2026' },
-  { id: 'c-vester',    name: 'Vester Foods',         domain: 'vesterfoods.dk',  plan: 'starter',    planLabel: 'Starter',    seats: { used: 8,   total: 10  }, health: 82, status: 'healthy',   mrrDkk: 980,   brandColor: '#5B8C5A', industry: 'Food',          createdOn: '2026-04-08', since: 'Apr 2026' },
-  { id: 'c-aalborg',   name: 'Aalborg Logistik',     domain: 'aalborg-log.dk',  plan: 'enterprise', planLabel: 'Enterprise', seats: { used: 87,  total: 100 }, health: 78, status: 'healthy',   mrrDkk: 14500, brandColor: '#0A0A0A', industry: 'Logistics',     createdOn: '2025-09-04', since: 'Sep 2025' },
-  { id: 'c-norrebro',  name: 'Nørrebro Studio',      domain: 'nbstudio.dk',     plan: 'business',   planLabel: 'Business',   seats: { used: 6,   total: 15  }, health: 68, status: 'trial',     mrrDkk: 0,     brandColor: '#FF6B4A', industry: 'Creative',      createdOn: '2026-05-12', since: '12 May 2026' },
-  { id: 'c-vsk',       name: 'Vestsjælland Kommune', domain: 'vsk.dk',          plan: 'enterprise', planLabel: 'Enterprise', seats: { used: 142, total: 200 }, health: 91, status: 'healthy',   mrrDkk: 28400, brandColor: '#5B3F7A', industry: 'Public sector', createdOn: '2024-11-20', since: 'Nov 2024' },
-  { id: 'c-broson',    name: 'Bro & Søn ApS',        domain: 'broson.dk',       plan: 'starter',    planLabel: 'Starter',    seats: { used: 4,   total: 10  }, health: 86, status: 'healthy',   mrrDkk: 490,   brandColor: '#3D3D38', industry: 'Retail',        createdOn: '2025-06-15', since: 'Jun 2025' },
-  { id: 'c-henriksen', name: 'Henriksen Revision',   domain: 'h-revision.dk',   plan: 'business',   planLabel: 'Business',   seats: { used: 18,  total: 25  }, health: 58, status: 'attention', mrrDkk: 3600,  brandColor: '#B85C38', industry: 'Accounting',    createdOn: '2026-01-08', since: 'Jan 2026' },
-]
-
 // 90-day MRR sparkline · matches the synthetic generator at partner-screens.jsx:198.
 // Deterministic seeded values (no Math.random calls each render).
 export const partnerMrrSparkline = [