https://learn.microsoft.com/en-us/officeupdates/current-channel 明日のお楽しみ
https://learn.microsoft.com/en-us/officeupdates/current-channel#version-2512-january-13
https://learn.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates#january-13-2026
https://learn.microsoft.com/en-us/officeupdates/current-channel-preview Version 2601 に移行
