{"id":18856,"date":"2026-10-09T03:02:56","date_gmt":"2026-10-08T18:02:56","guid":{"rendered":"https:\/\/m365jp.net\/?p=18856"},"modified":"2026-10-09T03:05:50","modified_gmt":"2026-10-08T18:05:50","slug":"mc1491763-prepare-for-windows-update-certificate-rotation-in-2027","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-10-09-mc1491763-prepare-for-windows-update-certificate-rotation-in-2027","title":{"rendered":"MC1491763 | Prepare for Windows Update certificate rotation in 2027"},"content":{"rendered":"
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MC1491763 | Prepare for Windows Update certificate rotation in 2027<\/th>\n<\/tr>\n<\/tbody>\n<\/table>\n
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Classification<\/th>\nstayInformed<\/td>\n<\/tr>\n
Last Updated<\/th>\n10\/08\/2026 17:15:07<\/td>\n<\/tr>\n
Start Time<\/th>\n10\/08\/2026 17:15:02<\/td>\n<\/tr>\n
End Time<\/th>\n10\/08\/2027 17:15:02<\/td>\n<\/tr>\n
Message Content<\/th>\n\n
What and why<\/b><\/div>\n
Certificates that help devices establish trusted connections to Windows Update will expire on May 17, 2027, and June 19, 2027. Devices must contain the replacement certificates to continue connecting to Windows Update and receiving updates after the applicable expiration date.<\/div>\n
<\/div>\n
Microsoft has delivered the replacement certificates through Windows security updates. Most devices running an in-support version of Windows require no additional action if they are current with monthly Windows updates.<\/div>\n
<\/div>\n
Rollout schedule<\/b><\/div>\n
The applicable certificates expire on May 17, 2027, and June 19, 2027. Required actions vary by Windows version.<\/div>\n
<\/div>\n
Impact on your organization<\/b><\/div>\n
Supported and updated devices will continue receiving updates without interruption. Supported devices need to be up to date to continue accessing Windows Update services after the applicable expiration date.<\/div>\n
<\/div>\n
Devices running unsupported versions of Windows will lose access to Windows Update services and will not receive updates as a result.<\/div>\n
<\/div>\n
This change does not apply to devices receiving updates from Windows Server Update Services (WSUS).<\/div>\n
<\/div>\n
Action required\/recommendations<\/b><\/div>\n
Identify devices that require action and update or upgrade them before the relevant expiration date:<\/div>\n
Machine Translation<\/th>\n\n
\u4f55\u3068\u306a\u305c<\/b><\/div>\n
\u30c7\u30d0\u30a4\u30b9\u304cWindows Update\u306b\u4fe1\u983c\u3055\u308c\u305f\u63a5\u7d9a\u3092\u78ba\u7acb\u3059\u308b\u306e\u3092\u652f\u63f4\u3059\u308b\u8a3c\u660e\u66f8\u306f\u30012027\u5e745\u670817\u65e5\u304a\u3088\u30732027\u5e746\u670819\u65e5\u306b\u671f\u9650\u5207\u308c\u3068\u306a\u308a\u307e\u3059\u3002\u30c7\u30d0\u30a4\u30b9\u306b\u306f\u3001Windows Update\u3078\u306e\u63a5\u7d9a\u3084\u66f4\u65b0\u306e\u53d7\u4fe1\u3092\u6709\u52b9\u671f\u9650\u5f8c\u3082\u7d99\u7d9a\u3059\u308b\u305f\u3081\u306b\u3001\u4ea4\u63db\u8a3c\u660e\u66f8\u3092\u542b\u307e\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002<\/div>\n
<\/div>\n
Microsoft\u306fWindows\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3092\u901a\u3058\u3066\u4ea4\u63db\u8a3c\u660e\u66f8\u3092\u63d0\u4f9b\u3057\u307e\u3057\u305f\u3002\u30b5\u30dd\u30fc\u30c8\u4e2d\u306eWindows\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u642d\u8f09\u3057\u305f\u307b\u3068\u3093\u3069\u306e\u30c7\u30d0\u30a4\u30b9\u306f\u3001\u6bce\u6708\u306eWindows\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u304c\u5e38\u306b\u884c\u308f\u308c\u3066\u3044\u308c\u3070\u8ffd\u52a0\u306e\u64cd\u4f5c\u306f\u4e0d\u8981\u3067\u3059\u3002<\/div>\n
<\/div>\n
\u5c55\u958b\u30b9\u30b1\u30b8\u30e5\u30fc\u30eb<\/b><\/div>\n
\u8a72\u5f53\u3059\u308b\u8a3c\u660e\u66f8\u306f2027\u5e745\u670817\u65e5\u304a\u3088\u30732027\u5e746\u670819\u65e5\u306b\u6709\u52b9\u671f\u9650\u5207\u308c\u3068\u306a\u308a\u307e\u3059\u3002\u5fc5\u8981\u306a\u64cd\u4f5c\u306fWindows\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u3088\u3063\u3066\u7570\u306a\u308a\u307e\u3059\u3002<\/div>\n
<\/div>\n
\u7d44\u7e54\u3078\u306e\u5f71\u97ff<\/b><\/div>\n
\u5bfe\u5fdc\u6e08\u307f\u304a\u3088\u3073\u66f4\u65b0\u3055\u308c\u305f\u30c7\u30d0\u30a4\u30b9\u306f\u3001\u9014\u5207\u308c\u306a\u304f\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3092\u53d7\u3051\u7d9a\u3051\u307e\u3059\u3002\u5bfe\u5fdc\u30c7\u30d0\u30a4\u30b9\u306f\u3001\u8a72\u5f53\u3059\u308b\u6709\u52b9\u671f\u9650\u5f8c\u3082Windows Update\u30b5\u30fc\u30d3\u30b9\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3092\u7d9a\u3051\u308b\u305f\u3081\u306b\u6700\u65b0\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/div>\n
<\/div>\n
\u5bfe\u5fdc\u3055\u308c\u3066\u3044\u306a\u3044Windows\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u30c7\u30d0\u30a4\u30b9\u306fWindows Update\u30b5\u30fc\u30d3\u30b9\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u306a\u304f\u306a\u308a\u3001\u305d\u306e\u7d50\u679c\u3001\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3092\u53d7\u3051\u53d6\u308c\u306a\u304f\u306a\u308a\u307e\u3059\u3002<\/div>\n
<\/div>\n
\u3053\u306e\u5909\u66f4\u306f\u3001Windows Server Update Services(WSUS)\u304b\u3089\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3092\u53d7\u3051\u53d6\u308b\u30c7\u30d0\u30a4\u30b9\u306b\u306f\u9069\u7528\u3055\u308c\u307e\u305b\u3093\u3002<\/div>\n
<\/div>\n
\u5fc5\u8981\u306a\u884c\u52d5\/\u63d0\u8a00<\/b><\/div>\n
\u5bfe\u5fdc\u304c\u5fc5\u8981\u306a\u30c7\u30d0\u30a4\u30b9\u3092\u7279\u5b9a\u3057\u3001\u8a72\u5f53\u3059\u308b\u6709\u52b9\u671f\u9650\u524d\u306b\u66f4\u65b0\u307e\u305f\u306f\u30a2\u30c3\u30d7\u30b0\u30ec\u30fc\u30c9\u3059\u308b:<\/div>\n