diff --git a/.gitea/workflows/server-deploy.yml b/.gitea/workflows/server-deploy.yml
index 69ade1c..90d9b7e 100644
--- a/.gitea/workflows/server-deploy.yml
+++ b/.gitea/workflows/server-deploy.yml
@@ -33,6 +33,7 @@ jobs:
                   IMAGE="${{ vars.DOCKER_HOST }}/${{ github.repository_owner }}/vantage/web:latest"
                   docker build \
                     --build-arg NEXT_PUBLIC_API_URL="${{ vars.API_URL }}" \
+                    --build-arg NEXT_PUBLIC_HQ_URL="${{ vars.HQ_URL }}" \
                     -t "$IMAGE" \
                     -f web/Dockerfile web/
                   docker push "$IMAGE"
diff --git a/web/Dockerfile b/web/Dockerfile
index ab71d66..1fa8358 100644
--- a/web/Dockerfile
+++ b/web/Dockerfile
@@ -17,6 +17,12 @@ COPY . .
 ARG NEXT_PUBLIC_API_URL=http://localhost:8080
 ENV NEXT_PUBLIC_API_URL=$NEXT_PUBLIC_API_URL
 
+# Empty default on purpose: a self-hosted install has no HQ portal, and the
+# "Managed in Vantage HQ" label falls back to plain text rather than linking
+# somewhere that does not serve them.
+ARG NEXT_PUBLIC_HQ_URL=
+ENV NEXT_PUBLIC_HQ_URL=$NEXT_PUBLIC_HQ_URL
+
 RUN npm run build
 
 # Runtime stage
diff --git a/web/app/(app)/settings/instance/page.tsx b/web/app/(app)/settings/instance/page.tsx
index 53adfd3..6db7975 100644
--- a/web/app/(app)/settings/instance/page.tsx
+++ b/web/app/(app)/settings/instance/page.tsx
@@ -69,6 +69,7 @@ function MembersCard() {
   
   const isOwner = user?.role === "owner";
   const assignableRoles = isOwner ? ROLES : ROLES.filter((r) => r !== "owner");
+  const hqUrl = process.env.NEXT_PUBLIC_HQ_URL ?? "";
 
   return (
     <Card>
@@ -113,7 +114,10 @@ function MembersCard() {
             {users.map((u: InstanceUser) => {
               const isSelf = u.user_id === user?.user_id;
               
-              const locked = isSelf || (u.role === "owner" && !isOwner);
+              const managedByHQ = u.auth_source === "hq";
+              // Locked here is a courtesy: the API returns 409 for an hq-sourced
+              // role change or deletion whether or not this select is rendered.
+              const locked = isSelf || managedByHQ || (u.role === "owner" && !isOwner);
               return (
                 <Tr key={u.user_id}>
                   <Td>
@@ -138,22 +142,39 @@ function MembersCard() {
                     )}
                   </Td>
                   <Td>
-                    <Badge variant="neutral">{u.auth_source === "oidc" ? "SSO" : "Password"}</Badge>
+                    <Badge variant="neutral">
+                      {u.auth_source === "oidc" ? "SSO" : u.auth_source === "hq" ? "Vantage HQ" : "Password"}
+                    </Badge>
                   </Td>
                   <Td className="text-text-secondary">
                     {u.last_login ? new Date(u.last_login).toLocaleString() : "Never"}
                   </Td>
                   <Td className="text-right">
-                    {!locked && (
-                      <Button
-                        variant="ghost"
-                        size="sm"
-                        onClick={() => {
-                          if (confirm(`Remove ${u.email} from this instance?`)) removeUser(u.user_id);
-                        }}
-                      >
-                        Remove
-                      </Button>
+                    {managedByHQ ? (
+                      hqUrl ? (
+                        <a
+                          href={hqUrl}
+                          target="_blank"
+                          rel="noreferrer"
+                          className="text-xs text-text-secondary underline"
+                        >
+                          Managed in Vantage HQ
+                        </a>
+                      ) : (
+                        <span className="text-xs text-text-tertiary">Managed in Vantage HQ</span>
+                      )
+                    ) : (
+                      !locked && (
+                        <Button
+                          variant="ghost"
+                          size="sm"
+                          onClick={() => {
+                            if (confirm(`Remove ${u.email} from this instance?`)) removeUser(u.user_id);
+                          }}
+                        >
+                          Remove
+                        </Button>
+                      )
                     )}
                   </Td>
                 </Tr>
diff --git a/web/lib/api.ts b/web/lib/api.ts
index 929adcb..9ed0b0e 100644
--- a/web/lib/api.ts
+++ b/web/lib/api.ts
@@ -335,7 +335,10 @@ export interface InstanceUser {
     instance_id: string;
     email: string;
     role: Role;
-    auth_source: "local" | "oidc";
+    // "hq" means the row was projected from a Vantage HQ account. Its role,
+    // password and existence belong to HQ; this instance refuses to change them.
+    auth_source: "local" | "oidc" | "hq";
+    hq_user_id?: string;
     created_at: string;
     last_login?: string;
 }