diff --git a/apps/public-docsite-v9/README.md b/apps/public-docsite-v9/README.md
index 4993868eb6e1ec..7427bec5facac5 100644
--- a/apps/public-docsite-v9/README.md
+++ b/apps/public-docsite-v9/README.md
@@ -9,3 +9,7 @@ Fluent UI is a collection of projects that represent the Fluent design language
 ## Start the website
 
 Run `yarn workspace @fluentui/public-docsite-v9 start`
+
+## Notes
+
+- `Open in CodeSandbox` button is located in different [repo](https://github.com/microsoft/fluentui-storybook-addons).