diff --git a/backend/sync_server/src/app_state/cursors.rs b/backend/sync_server/src/app_state/cursors.rs
index a48aceec..a2dc6807 100644
--- a/backend/sync_server/src/app_state/cursors.rs
+++ b/backend/sync_server/src/app_state/cursors.rs
@@ -34,6 +34,7 @@ impl Cursors {
     pub async fn update_cursors(
         &self,
         vault_id: VaultId,
+        user_name: String,
         device_id: &DeviceId,
         document_to_cursors: HashMap<String, Vec<CursorSpan>>,
     ) {
@@ -43,6 +44,7 @@ impl Cursors {
 
         all_device_cursors.retain(|c| &c.client_cursors.device_id != device_id);
         all_device_cursors.push(ClientCursorsWithTimeToLive::new(ClientCursors {
+            user_name,
             device_id: device_id.to_string(),
             cursors: document_to_cursors,
         }));
diff --git a/backend/sync_server/src/app_state/websocket/models.rs b/backend/sync_server/src/app_state/websocket/models.rs
index 0b8e1828..6bb4f4e1 100644
--- a/backend/sync_server/src/app_state/websocket/models.rs
+++ b/backend/sync_server/src/app_state/websocket/models.rs
@@ -31,6 +31,7 @@ pub struct CursorPositionFromClient {
 #[derive(TS, Serialize, Clone, Debug)]
 #[serde(rename_all = "camelCase")]
 pub struct ClientCursors {
+    pub user_name: String,
     pub device_id: DeviceId,
     pub cursors: HashMap<String, Vec<CursorSpan>>,
 }
diff --git a/backend/sync_server/src/app_state/websocket/utils.rs b/backend/sync_server/src/app_state/websocket/utils.rs
index cf337e39..1e0dd243 100644
--- a/backend/sync_server/src/app_state/websocket/utils.rs
+++ b/backend/sync_server/src/app_state/websocket/utils.rs
@@ -8,15 +8,21 @@ use crate::{
         AppState,
         database::models::{DocumentVersionWithoutContent, VaultId, VaultUpdateId},
     },
+    config::user_config::User,
     errors::{SyncServerError, server_error, unauthenticated_error},
     server::auth::auth,
 };
 
+pub struct AuthenticatedWebSocketHandshake {
+    pub handshake: WebSocketHandshake,
+    pub user: User,
+}
+
 pub fn get_authenticated_handshake(
     state: &AppState,
     vault_id: &VaultId,
     message: Option<Message>,
-) -> Result<WebSocketHandshake, SyncServerError> {
+) -> Result<AuthenticatedWebSocketHandshake, SyncServerError> {
     if let Some(Message::Text(message)) = message {
         let message: WebSocketClientMessage = serde_json::from_str(&message)
             .context("Failed to parse message")
@@ -24,8 +30,8 @@ pub fn get_authenticated_handshake(
 
         match message {
             WebSocketClientMessage::Handshake(handshake) => {
-                auth(state, handshake.token.trim(), vault_id)?;
-                Ok(handshake)
+                let user = auth(state, handshake.token.trim(), vault_id)?;
+                Ok(AuthenticatedWebSocketHandshake { handshake, user })
             }
             WebSocketClientMessage::CursorPositions(_) => Err(unauthenticated_error(
                 anyhow::anyhow!("Expected a handshake message"),
diff --git a/backend/sync_server/src/server/websocket.rs b/backend/sync_server/src/server/websocket.rs
index cfe7f8f9..e9dd8867 100644
--- a/backend/sync_server/src/server/websocket.rs
+++ b/backend/sync_server/src/server/websocket.rs
@@ -52,6 +52,7 @@ async fn websocket_wrapped(state: AppState, stream: WebSocket, vault_id: VaultId
     }
 }
 
+#[allow(clippy::too_many_lines)]
 async fn websocket(
     state: AppState,
     stream: WebSocket,
@@ -59,7 +60,7 @@ async fn websocket(
 ) -> Result<(), SyncServerError> {
     let (mut sender, mut websocket_receiver) = stream.split();
 
-    let handshake = get_authenticated_handshake(
+    let authed_handshake = get_authenticated_handshake(
         &state,
         &vault_id,
         websocket_receiver
@@ -71,15 +72,19 @@ async fn websocket(
 
     info!(
         "WebSocket handshake successful for vault '{vault_id}' for '{}'",
-        handshake.device_id
+        authed_handshake.handshake.device_id
     );
 
     let mut broadcast_receiver = state.broadcasts.get_receiver(vault_id.clone()).await;
 
     send_update_over_websocket(
         &WebSocketServerMessage::VaultUpdate(WebSocketVaultUpdate {
-            documents: get_unseen_documents(&state, &vault_id, handshake.last_seen_vault_update_id)
-                .await?,
+            documents: get_unseen_documents(
+                &state,
+                &vault_id,
+                authed_handshake.handshake.last_seen_vault_update_id,
+            )
+            .await?,
             is_initial_sync: true,
         }),
         &mut sender,
@@ -94,7 +99,7 @@ async fn websocket(
     )
     .await?;
 
-    let device_id = handshake.device_id.clone();
+    let device_id = authed_handshake.handshake.device_id.clone();
     let mut send_task = tokio::spawn(async move {
         while let Ok(update) = broadcast_receiver.recv().await {
             if Some(&device_id) == update.origin_device_id.as_ref() {
@@ -107,7 +112,7 @@ async fn websocket(
         Ok::<(), SyncServerError>(())
     });
 
-    let device_id = handshake.device_id.clone();
+    let device_id = authed_handshake.handshake.device_id.clone();
     let vault_id_clone = vault_id.clone();
     let cursor_manager = state.cursors.clone();
     let mut receive_task = tokio::spawn(async move {
@@ -126,6 +131,7 @@ async fn websocket(
                     cursor_manager
                         .update_cursors(
                             vault_id_clone.clone(),
+                            authed_handshake.user.name.clone(),
                             &device_id,
                             cursors.document_to_cursors,
                         )
@@ -161,13 +167,13 @@ async fn websocket(
 
     state
         .cursors
-        .remove_cursors_of_device(&vault_id, &handshake.device_id)
+        .remove_cursors_of_device(&vault_id, &authed_handshake.handshake.device_id)
         .await;
 
     if result.is_err() {
         info!(
             "WebSocket disconnected on vault '{vault_id}' for '{}'",
-            handshake.device_id
+            authed_handshake.handshake.device_id
         );
     }
 
diff --git a/frontend/sync-client/src/services/types/ClientCursors.ts b/frontend/sync-client/src/services/types/ClientCursors.ts
index 87ebebdf..a70420b8 100644
--- a/frontend/sync-client/src/services/types/ClientCursors.ts
+++ b/frontend/sync-client/src/services/types/ClientCursors.ts
@@ -1,4 +1,4 @@
 // This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
 import type { CursorSpan } from "./CursorSpan";
 
-export type ClientCursors = { deviceId: string, cursors: { [key in string]?: Array<CursorSpan> }, };
+export type ClientCursors = { userName: string, deviceId: string, cursors: { [key in string]?: Array<CursorSpan> }, };