Office.onReady(() => {
  // Ensure the environment is Outlook before proceeding
  if (Office.context.mailbox.item) {
    Office.context.mailbox.item.onMessageCompose.addAsync((eventArgs) => {
      const item = eventArgs.item;
      // Get the itemId of the original message
      item.getInitializationContextAsync((result) => {
        if (result.status === Office.AsyncResultStatus.Succeeded) {
          console.log('Original Item ID:', result.value.itemId);
        } else {
          console.error('Error fetching original item ID:', result.error);
        }
      });
    });
  }
});