{"id":16016,"date":"2026-04-20T07:00:51","date_gmt":"2026-04-19T22:00:51","guid":{"rendered":"https:\/\/m365jp.net\/?p=16016"},"modified":"2026-04-20T07:01:43","modified_gmt":"2026-04-19T22:01:43","slug":"mc1285472-take-action-out-of-band-updates-released-for-windows-server-to-address-two-issues","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-04-20-mc1285472-take-action-out-of-band-updates-released-for-windows-server-to-address-two-issues","title":{"rendered":"MC1285472 | Take action: Out-of-band updates released for Windows Server to address two issues"},"content":{"rendered":"<div class=\"postie-post\">\n<div>\n<hr>\n<table id=\"section\">\n<tbody>\n<tr>\n<th width=\"95%\">MC1285472 | Take action: Out-of-band updates released for Windows Server to address two issues<\/th>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr>\n<table id=\"data\">\n<tbody>\n<tr>\n<th>Classification<\/th>\n<td>preventOrFixIssue<\/td>\n<\/tr>\n<tr>\n<th>Last Updated<\/th>\n<td>04\/19\/2026 21:13:16<\/td>\n<\/tr>\n<tr>\n<th>Start Time<\/th>\n<td>04\/19\/2026 21:13:15<\/td>\n<\/tr>\n<tr>\n<th>End Time<\/th>\n<td>04\/19\/2027 21:13:15<\/td>\n<\/tr>\n<tr>\n<th>Message Content<\/th>\n<td>\n<div>Microsoft has released out-of-band (OOB) updates today, April 19, 2026, to address issues introduced by the April 2026 Windows security update.<\/div>\n<div>  <\/div>\n<div>A limited number of Windows Server 2025 devices might experience failures installing the April 2026 security update (<a href=\"https:\/\/support.microsoft.com\/help\/5082063\" rel=\"noopener noreferrer\" target=\"_blank\">KB5082063<\/a>). In addition, some versions   of Windows Server may experience <a href=\"https:\/\/learn.microsoft.com\/windows\/release-health\/status-windows-server-2025#4833msgdesc\" rel=\"noopener noreferrer\" target=\"_blank\">  domain controllers restarting repeatedly<\/a> after installing the April 2026 security update.<\/div>\n<div>  <\/div>\n<div>To address these issues, Microsoft has released OOB updates for the Windows Server versions listed below. Note: The Windows Server 2025 OOB update (<a href=\"https:\/\/support.microsoft.com\/help\/5091157\" rel=\"noopener noreferrer\" target=\"_blank\">KB5091157<\/a>)   addresses both the installation failure issue and the domain controller restart issue. OOB updates released for other supported Windows Server versions address only the domain controller restart issue.<\/div>\n<div>  <\/div>\n<div>For complete guidance and installation instructions, see the relevant KB articles:<\/div>\n<div>  <\/div>\n<div>Standard Windows updates<\/div>\n<ul>\n<li>Windows Server 2025: <a href=\"https:\/\/support.microsoft.com\/topic\/13ab53cc-ccc8-4a00-89d2-823b58fa03ec\" rel=\"noopener noreferrer\" target=\"_blank\">  KB5091157 (OS Build 26100.32698) Out-of-band<\/a><\/li>\n<li>Windows Server, version 23H2: <a href=\"https:\/\/support.microsoft.com\/help\/5091571\" rel=\"noopener noreferrer\" target=\"_blank\">  KB5091571 (OS Build 25398.2276) Out-of-band<\/a><\/li>\n<li>Windows Server 2022: <a href=\"https:\/\/support.microsoft.com\/topic\/4a5a784e-e50a-4358-8093-b1654aecdbd1\" rel=\"noopener noreferrer\" target=\"_blank\">  KB5091575 (OS Build 20348.5024) Out-of-band<\/a><\/li>\n<li>Windows Server 2019: <a href=\"https:\/\/support.microsoft.com\/topic\/08263e6c-c20a-423f-8d75-9c6d77a0c75e\" rel=\"noopener noreferrer\" target=\"_blank\">  KB5091573 (OS Build 17763.8647) Out-of-band<\/a><\/li>\n<li>Windows Server 2016: <a href=\"https:\/\/support.microsoft.com\/topic\/5df74339-4bd0-4fd0-af74-45972f072abb\" rel=\"noopener noreferrer\" target=\"_blank\">  KB5091572 (OS Build 14393.9062) Out-of-band<\/a><\/li>\n<\/ul>\n<div>  <\/div>\n<div>Windows hotpatch updates<\/div>\n<ul>\n<li>Windows Server 2025 Datacenter: Azure Edition: <a href=\"https:\/\/support.microsoft.com\/topic\/b09952e2-f7e1-4af0-a479-ecf2c427af56\" rel=\"noopener noreferrer\" target=\"_blank\">  Hotpatch KB5091470 (OS Build 26100.32704) Out-of-band<\/a><\/li>\n<li>Windows Server 2022 Datacenter: Azure Edition: <a href=\"https:\/\/support.microsoft.com\/topic\/5b2259b9-a15f-4cc4-b18f-f4f2c3b6b184\" rel=\"noopener noreferrer\" target=\"_blank\">  Hotpatch KB5091576 (OS Build 20348.5029) Out-of-band<\/a><\/li>\n<\/ul>\n<\/td>\n<\/tr>\n<tr>\n<th>Machine Translation<\/th>\n<td>\n<div>Microsoft\u306f\u672c\u65e5\u30012026\u5e744\u670819\u65e5\u306b\u30a2\u30a6\u30c8\u30aa\u30d6\u30d0\u30f3\u30c9(OOB)\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3092\u30ea\u30ea\u30fc\u30b9\u3057\u30012026\u5e744\u6708\u306eWindows\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3067\u751f\u3058\u305f\u554f\u984c\u306b\u5bfe\u5fdc\u3057\u307e\u3057\u305f\u3002<\/div>\n<div>  <\/div>\n<div>\u4e00\u90e8\u306eWindows Server 2025\u30c7\u30d0\u30a4\u30b9\u3067\u306f\u30012026\u5e744\u6708\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8(<a href=\"https:\/\/support.microsoft.com\/help\/5082063\" rel=\"noopener noreferrer\" target=\"_blank\">KB5082063<\/a>)\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u306b\u5931\u6557\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u3055\u3089\u306b\u3001\u4e00\u90e8\u306eWindows Server\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u306f\u30012026\u5e744\u6708\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u305f\u5f8c\u306b  <a href=\"https:\/\/learn.microsoft.com\/windows\/release-health\/status-windows-server-2025#4833msgdesc\" rel=\"noopener noreferrer\" target=\"_blank\">  \u30c9\u30e1\u30a4\u30f3\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u30fc\u304c\u7e70\u308a\u8fd4\u3057\u518d\u8d77\u52d5\u3059\u308b<\/a> \u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/div>\n<div>  <\/div>\n<div>\u3053\u308c\u3089\u306e\u554f\u984c\u306b\u5bfe\u51e6\u3059\u308b\u305f\u3081\u3001Microsoft\u306f\u4ee5\u4e0b\u306b\u6319\u3052\u308bWindows Server\u30d0\u30fc\u30b8\u30e7\u30f3\u5411\u3051\u306bOOB\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3092\u30ea\u30ea\u30fc\u30b9\u3057\u307e\u3057\u305f\u3002\u6ce8:Windows Server 2025 OOB\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8(<a href=\"https:\/\/support.microsoft.com\/help\/5091157\" rel=\"noopener noreferrer\" target=\"_blank\">KB5091157<\/a>)\u306f\u3001\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u5931\u6557\u306e\u554f\u984c\u3068\u30c9\u30e1\u30a4\u30f3\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u30fc\u518d\u8d77\u52d5\u306e\u554f\u984c\u306e\u4e21\u65b9\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u307e\u3059\u3002\u4ed6\u306e\u5bfe\u5fdcWindows   Server\u30d0\u30fc\u30b8\u30e7\u30f3\u5411\u3051\u306b\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u305fOOB\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u306f\u3001\u30c9\u30e1\u30a4\u30f3\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u30fc\u306e\u518d\u8d77\u52d5\u554f\u984c\u306e\u307f\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u307e\u3059\u3002<\/div>\n<div>  <\/div>\n<div>\u5b8c\u5168\u306a\u30ac\u30a4\u30c0\u30f3\u30b9\u3068\u8a2d\u7f6e\u624b\u9806\u306b\u3064\u3044\u3066\u306f\u3001\u95a2\u9023\u3059\u308bKB\u8a18\u4e8b\u3092\u3054\u89a7\u304f\u3060\u3055\u3044:<\/div>\n<div>  <\/div>\n<div>\u6a19\u6e96Windows\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8<\/div>\n<ul>\n<li>Windows Server 2025: <a href=\"https:\/\/support.microsoft.com\/topic\/13ab53cc-ccc8-4a00-89d2-823b58fa03ec\" rel=\"noopener noreferrer\" target=\"_blank\">  KB5091157(OS\u30d3\u30eb\u30c926100.32698)\u30a2\u30a6\u30c8\u30aa\u30d6\u30d0\u30f3\u30c9<\/a><\/li>\n<li>Windows Server\u3001\u30d0\u30fc\u30b8\u30e7\u30f323H2: <a href=\"https:\/\/support.microsoft.com\/help\/5091571\" rel=\"noopener noreferrer\" target=\"_blank\">  KB5091571(OS\u30d3\u30eb\u30c925398.2276)\u30a2\u30a6\u30c8\u30aa\u30d6\u30d0\u30f3\u30c9<\/a><\/li>\n<li>Windows Server 2022: <a href=\"https:\/\/support.microsoft.com\/topic\/4a5a784e-e50a-4358-8093-b1654aecdbd1\" rel=\"noopener noreferrer\" target=\"_blank\">  KB5091575(OS\u30d3\u30eb\u30c920348.5024)\u30a2\u30a6\u30c8\u30aa\u30d6\u30d0\u30f3\u30c9<\/a><\/li>\n<li>Windows Server 2019: <a href=\"https:\/\/support.microsoft.com\/topic\/08263e6c-c20a-423f-8d75-9c6d77a0c75e\" rel=\"noopener noreferrer\" target=\"_blank\">  KB5091573(OS\u30d3\u30eb\u30c917763.8647)\u30a2\u30a6\u30c8\u30aa\u30d6\u30d0\u30f3\u30c9<\/a><\/li>\n<li>Windows Server 2016: <a href=\"https:\/\/support.microsoft.com\/topic\/5df74339-4bd0-4fd0-af74-45972f072abb\" rel=\"noopener noreferrer\" target=\"_blank\">  KB5091572(OS\u30d3\u30eb\u30c914393.9062)\u30a2\u30a6\u30c8\u30aa\u30d6\u30d0\u30f3\u30c9<\/a><\/li>\n<\/ul>\n<div>  <\/div>\n<div>Windows\u30db\u30c3\u30c8\u30d1\u30c3\u30c1\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8<\/div>\n<ul>\n<li>Windows Server 2025 Datacenter: Azure Edition: <a href=\"https:\/\/support.microsoft.com\/topic\/b09952e2-f7e1-4af0-a479-ecf2c427af56\" rel=\"noopener noreferrer\" target=\"_blank\">  Hotpatch KB5091470 (OS Build 26100.32704) Out-of-band<\/a><\/li>\n<li>Windows Server 2022 Datacenter: Azure Edition: <a href=\"https:\/\/support.microsoft.com\/topic\/5b2259b9-a15f-4cc4-b18f-f4f2c3b6b184\" rel=\"noopener noreferrer\" target=\"_blank\">  Hotpatch KB5091576 (OS Build 20348.5029) Out-of-band<\/a><\/li>\n<\/ul>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>MC1285472 | Take action: Out-of-band updates released for Windows Server to address two issues Classification  [&hellip;]<\/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-16016","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/16016","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=16016"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/16016\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=16016"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=16016"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=16016"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}