iPad 本身已安裝有 Apple 的數款內置應用程式，包括日曆、地圖、電視、語音備忘錄和許多其他應用程式。有時候，它們不受 MDM 管理或存在使用上的問題。在這種情況下，您可以考慮：
- 手動將應用程式從 iPad 移除（您可能需要先行停止描述檔“禁用 AppStore / 應用程式安裝 / 刪除”，“禁止刪除應用程式” 並暫停設定"主畫面圖示排列"）
- 再次安裝 VPP 應用程式
Why I cannot open Apple Native App？
Apple Native Apps, including Calendar, Map, TV, Voice Memo, and many others, come with iPads. Sometimes, they are not managed by MDM or have a problem to open for use. In this case, you may consider:
- Delete the Apps manually from the iPads (you may need to remove profiles "Disable AppStore/Apps Install/Remove", "Disallow App Removal" and unset Homescreen Layout)
- VPP Install the Apps again