diff --git a/content/posts/macos/macOS Security Overview/index.md b/content/posts/macos/macOS Security Overview/index.md
index 281be294..2f82b44a 100644
--- a/content/posts/macos/macOS Security Overview/index.md	
+++ b/content/posts/macos/macOS Security Overview/index.md	
@@ -250,6 +250,8 @@ You can also [add a checksum](https://support.apple.com/guide/disk-utility/add-a
 
 If you use iCloud, you should enable [Advanced Data Protection](https://support.apple.com/en-us/108756) so that your files are E2EE.
 
+Notethat your [calendar, email, and contacts](https://support.apple.com/en-us/102651) are not E2EE due to protocol limitations.
+
 If you want to be able to install apps from the App Store without enabling iCloud, you can sign in to your Apple Account from the App Store instead of **System Settings**.
 
 You can also add a [security key](https://support.apple.com/en-us/102637) to your Apple Account for extra protection.