diff --git a/src/stores/sync/connected-sites-slice.ts b/src/stores/sync/connected-sites-slice.ts
index 5157ad018..2e78853e1 100644
--- a/src/stores/sync/connected-sites-slice.ts
+++ b/src/stores/sync/connected-sites-slice.ts
@@ -1,6 +1,7 @@
 import { createAsyncThunk, createSelector, createSlice, PayloadAction } from '@reduxjs/toolkit';
+import fastDeepEqual from 'fast-deep-equal';
 import { getIpcApi } from 'src/lib/get-ipc-api';
-import { RootState } from 'src/stores';
+import { RootState, store } from 'src/stores';
 import type { SyncSite } from 'src/hooks/use-fetch-wpcom-sites/types';
 import type { SyncModalMode } from 'src/modules/sync/types';
 
@@ -145,3 +146,19 @@ export const connectedSitesSelectors = {
 			localSiteId ? connectedSitesState.sites[ localSiteId ] || [] : []
 	),
 };
+
+window.ipcListener.subscribe( 'user-data-updated', async ( _, userData ) => {
+	const state = store.getState();
+	const currentUserId = userData.authToken?.id;
+
+	if ( ! currentUserId ) {
+		return;
+	}
+
+	const connectedSitesFromUserData = userData.connectedWpcomSites?.[ currentUserId ] || [];
+	const connectedSitesFromState = Object.values( state.connectedSites.sites ).flat();
+
+	if ( ! fastDeepEqual( connectedSitesFromUserData, connectedSitesFromState ) ) {
+		void store.dispatch( loadAllConnectedSites() );
+	}
+} );