サーバに手を入れたくない場合は、Raspberry Pi 等を使って、単独 ntpd サーバを作る事もできます。拠点間で時刻を正確に合わせたい場合や、マイナンバー関連で局所ネットワークがインターネットから切り離しているパソコンの時刻合わせなどに使えると思います。時刻の合わない端末がある方はご相談下さい。
The technical storage or access is strictly necessary for the legitimate purpose of enabling the use of a specific service explicitly requested by the subscriber or user, or for the sole purpose of carrying out the transmission of a communication over an electronic communications network.
Preferences
The technical storage or access is necessary for the legitimate purpose of storing preferences that are not requested by the subscriber or user.
統計
The technical storage or access that is used exclusively for statistical purposes.The technical storage or access that is used exclusively for anonymous statistical purposes. Without a subpoena, voluntary compliance on the part of your Internet Service Provider, or additional records from a third party, information stored or retrieved for this purpose alone cannot usually be used to identify you.
Marketing
The technical storage or access is required to create user profiles to send advertising, or to track the user on a website or across several websites for similar marketing purposes.