{"id":12839,"date":"2025-09-12T08:01:31","date_gmt":"2025-09-11T23:01:31","guid":{"rendered":"https:\/\/m365jp.net\/?p=12839"},"modified":"2025-09-12T08:01:37","modified_gmt":"2025-09-11T23:01:37","slug":"mc1151677-updated-microsoft-defender-antivirus-avsignaturedue-policy-limit","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2025-09-12-mc1151677-updated-microsoft-defender-antivirus-avsignaturedue-policy-limit","title":{"rendered":"MC1151677 | Updated Microsoft Defender Antivirus AVSignatureDue policy limit"},"content":{"rendered":"
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MC1151677 | Updated Microsoft Defender Antivirus AVSignatureDue policy limit<\/th>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n\n\n\n\n\n\n\n\n
Classification<\/th>\npreventOrFixIssue<\/td>\n<\/tr>\n
Last Updated<\/th>\n09\/11\/2025 22:05:05<\/td>\n<\/tr>\n
Start Time<\/th>\n09\/11\/2025 22:04:55<\/td>\n<\/tr>\n
End Time<\/th>\n11\/18\/2025 08:00:00<\/td>\n<\/tr>\n
Message Content<\/th>\n\n

Introduction<\/b><\/p>\n

To improve the accuracy of signature age alerts in Microsoft Defender Antivirus<\/i>, we\u2019re updating the minimum supported value for the AVSignatureDue<\/i> policy. Previously, this setting could be configured to as low as one day, which led to misleading alerts due to timing misalignment between signature updates and checks. Starting in September 2025, the minimum value will be set to 2 days. <\/p>\n

When this will happen<\/b><\/p>\n

General Availability (Worldwide): Rollout will begin in late September 2025 and is expected to complete by mid-October 2025. <\/p>\n

How this affects your organization<\/b><\/p>\n

This change will only affect organizations that have configured the AVSignatureDue<\/i> policy to a value less than 2 days. After this update, any value below 2 days will no longer be supported. This adjustment helps prevent false alerts indicating outdated signatures when updates have already been applied. <\/p>\n

What you can do to prepare<\/b><\/p>\n

If your organization has set the AVSignatureDue<\/i> policy to less than 2 days, update the configuration to 2 days or higher to ensure continued policy compliance and accurate alerting. <\/p>\n

Learn more: Microsoft Defender Antivirus policy documentation<\/a>. <\/p>\n

Compliance considerations<\/b><\/p>\n

<\/b><\/p>\n<\/p>\n

No compliance considerations identified, review as appropriate for your organization. <\/p>\n

Machine Translation<\/th>\n\n

\u7d39\u4ecb<\/b><\/p>\n

Microsoft Defender \u30a6\u30a4\u30eb\u30b9\u5bfe\u7b56<\/i>\u306e\u7f72\u540d\u7d4c\u904e\u6642\u9593\u30a2\u30e9\u30fc\u30c8\u306e\u7cbe\u5ea6\u3092\u5411\u4e0a\u3055\u305b\u308b\u305f\u3081\u306b\u3001AVSignatureDue<\/i> \u30dd\u30ea\u30b7\u30fc\u3067\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u308b\u6700\u5c0f\u5024\u3092\u66f4\u65b0\u3057\u3066\u3044\u307e\u3059\u3002\u4ee5\u524d\u306f\u3001\u3053\u306e\u8a2d\u5b9a\u3092 1 \u65e5\u7a0b\u5ea6\u306b\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u3001\u30b7\u30b0\u30cd\u30c1\u30e3\u306e\u66f4\u65b0\u3068\u30c1\u30a7\u30c3\u30af\u306e\u9593\u306e\u30bf\u30a4\u30df\u30f3\u30b0\u306e\u305a\u308c\u306b\u3088\u308a\u3001\u8aa4\u89e3\u3092\u62db\u304f\u30a2\u30e9\u30fc\u30c8\u304c\u767a\u751f\u3057\u3066\u3044\u307e\u3057\u305f\u30022025\u5e749\u6708\u4ee5\u964d\u3001\u6700\u5c0f\u5024\u306f2\u65e5\u306b\u8a2d\u5b9a\u3055\u308c\u307e\u3059\u3002<\/p>\n

\u3053\u308c\u304c\u3044\u3064\u8d77\u3053\u308b\u304b<\/b><\/p>\n

\u4e00\u822c\u63d0\u4f9b (\u5168\u4e16\u754c): \u30ed\u30fc\u30eb\u30a2\u30a6\u30c8\u306f 2025 \u5e74 9 \u6708\u4e0b\u65ec\u306b\u958b\u59cb\u3055\u308c\u30012025 \u5e74 10 \u6708\u4e2d\u65ec\u307e\u3067\u306b\u5b8c\u4e86\u3059\u308b\u4e88\u5b9a\u3067\u3059\u3002<\/p>\n

\u3053\u308c\u304c\u7d44\u7e54\u306b\u4e0e\u3048\u308b\u5f71\u97ff<\/b><\/p>\n

\u3053\u306e\u5909\u66f4\u306f\u3001 AVSignatureDue<\/i> \u30dd\u30ea\u30b7\u30fc\u3092 2 \u65e5\u672a\u6e80\u306e\u5024\u306b\u8a2d\u5b9a\u3057\u305f\u7d44\u7e54\u306b\u306e\u307f\u5f71\u97ff\u3057\u307e\u3059\u3002\u3053\u306e\u66f4\u65b0\u5f8c\u30012 \u65e5\u672a\u6e80\u306e\u5024\u306f\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u306a\u304f\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u8abf\u6574\u306b\u3088\u308a\u3001\u66f4\u65b0\u304c\u3059\u3067\u306b\u9069\u7528\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u306b\u3001\u53e4\u3044\u7f72\u540d\u3092\u793a\u3059\u8aa4\u3063\u305f\u30a2\u30e9\u30fc\u30c8\u3092\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n

\u6e96\u5099\u3059\u308b\u305f\u3081\u306b\u3067\u304d\u308b\u3053\u3068<\/b><\/p>\n

\u7d44\u7e54\u3067 AVSignatureDue<\/i> \u30dd\u30ea\u30b7\u30fc\u3092 2 \u65e5\u672a\u6e80\u306b\u8a2d\u5b9a\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u8a2d\u5b9a\u3092 2 \u65e5\u4ee5\u4e0a\u306b\u66f4\u65b0\u3057\u3066\u3001\u30dd\u30ea\u30b7\u30fc\u3078\u306e\u7d99\u7d9a\u7684\u306a\u30b3\u30f3\u30d7\u30e9\u30a4\u30a2\u30f3\u30b9\u3068\u6b63\u78ba\u306a\u30a2\u30e9\u30fc\u30c8\u3092\u78ba\u4fdd\u3057\u307e\u3059\u3002 <\/p>\n

\u8a73\u7d30\u60c5\u5831: Microsoft Defender \u30a6\u30a4\u30eb\u30b9\u5bfe\u7b56\u30dd\u30ea\u30b7\u30fc\u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3002<\/a><\/p>\n

\u30b3\u30f3\u30d7\u30e9\u30a4\u30a2\u30f3\u30b9\u306b\u95a2\u3059\u308b\u8003\u616e\u4e8b\u9805<\/b><\/p>\n

<\/b><\/p>\n<\/p>\n

\u30b3\u30f3\u30d7\u30e9\u30a4\u30a2\u30f3\u30b9\u306b\u95a2\u3059\u308b\u8003\u616e\u4e8b\u9805\u304c\u7279\u5b9a\u3055\u308c\u3066\u3044\u306a\u3044\u5834\u5408\u306f\u3001\u7d44\u7e54\u306b\u5fdc\u3058\u3066\u78ba\u8a8d\u3057\u307e\u3059\u3002 <\/p>\n


<\/b><\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

MC1151677 | Updated Microsoft Defender Antivirus AVSignatureDue policy limit Classification preventOrFixIssue […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-12839","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/12839","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/comments?post=12839"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/12839\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=12839"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=12839"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=12839"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}