diff --git a/pc4mobx/organization/components/office/components/leftTree.js b/pc4mobx/organization/components/office/components/leftTree.js
index bb12530..e8d7f80 100644
--- a/pc4mobx/organization/components/office/components/leftTree.js
+++ b/pc4mobx/organization/components/office/components/leftTree.js
@@ -253,9 +253,10 @@ class LeftTree extends Component {
     });
   };
 
-  onExpand = expandedKeys => {
+  onExpand = keys => {
+    const { expandedKeys } = this.state;
     this.setState({
-      expandedKeys
+      expandedKeys: expandedKeys.includes("-1") ? [] : keys
     });
   };