diff --git a/SharepointToolbox/Core/Messages/GlobalSitesChangedMessage.cs b/SharepointToolbox/Core/Messages/GlobalSitesChangedMessage.cs
new file mode 100644
index 0000000..468313b
--- /dev/null
+++ b/SharepointToolbox/Core/Messages/GlobalSitesChangedMessage.cs
@@ -0,0 +1,9 @@
+using CommunityToolkit.Mvvm.Messaging.Messages;
+using SharepointToolbox.Core.Models;
+
+namespace SharepointToolbox.Core.Messages;
+
+public sealed class GlobalSitesChangedMessage : ValueChangedMessage<IReadOnlyList<SiteInfo>>
+{
+    public GlobalSitesChangedMessage(IReadOnlyList<SiteInfo> sites) : base(sites) { }
+}