{"id":15889,"date":"2026-04-14T06:01:10","date_gmt":"2026-04-13T21:01:10","guid":{"rendered":"https:\/\/m365jp.net\/?p=15889"},"modified":"2026-04-14T06:01:19","modified_gmt":"2026-04-13T21:01:19","slug":"servicerestored-dz1266872-microsoft-defender-xdr-admins-may-notice-excessive-memory-usage-on-their-windows-server-2016-machines","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-04-14-servicerestored-dz1266872-microsoft-defender-xdr-admins-may-notice-excessive-memory-usage-on-their-windows-server-2016-machines","title":{"rendered":"[serviceRestored] DZ1266872 | Microsoft Defender XDR | Admins may notice excessive memory usage on their Windows Server 2016 machines"},"content":{"rendered":"<div class=\"postie-post\">\n<div>\n<hr>\n<table id=\"section\">\n<tbody>\n<tr>\n<th width=\"95%\">DZ1266872 | Microsoft Defender XDR | Admins may notice excessive memory usage on their Windows Server 2016 machines<\/th>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr>\n<table id=\"data\">\n<tbody>\n<tr>\n<th>Status<\/th>\n<td class=\"bad\">serviceRestored<\/td>\n<\/tr>\n<tr>\n<th>Classification<\/th>\n<td>advisory<\/td>\n<\/tr>\n<tr>\n<th>User Impact<\/th>\n<td>Admins may have noticed excessive memory usage on their Windows Server 2016 machines.<\/td>\n<\/tr>\n<tr>\n<th>Last Updated<\/th>\n<td>04\/13\/2026 20:32:10<\/td>\n<\/tr>\n<tr>\n<th>Start Time<\/th>\n<td>03\/23\/2026 00:00:00<\/td>\n<\/tr>\n<tr>\n<th>End Time<\/th>\n<td>04\/13\/2026 00:00:00<\/td>\n<\/tr>\n<tr>\n<th>Latest Message<\/th>\n<td>Title: Admins may notice excessive memory usage on their Windows Server 2016 machines<\/p>\n<p>  User impact: Admins may have noticed excessive memory usage on their Windows Server 2016 machines.<\/p>\n<p>  More info: Admins may have noticed delays or timeouts with third-party applications hosted on affected Windows Sever 2016 machines running Microsoft Defender for Endpoint\u2019s Sense.<\/p>\n<p>  Final status: We&#8217;ve determined that a recent code change exposed an issue with how the Windows Server 2016 machine operating system handles Microsoft Defender for Endpoint service requests and was resulting in the observed impact. We&#8217;ve confirmed through an   extended period of monitoring that our service optimizations have successfully reached all previously impacted devices, fully resolving the issue.<\/p>\n<p>  Scope of impact: Any Windows Server 2016 admin may have been impacted.<\/p>\n<p>  Start time: Monday, March 23, 2026, at 12:00 AM UTC<\/p>\n<p>  End time: Monday, April 13, 2026, at 12:00 AM UTC<\/p>\n<p>  Root cause:&nbsp; A recent code change exposed an issue with how the Windows Server 2016 machine operating system handles Microsoft Defender for Endpoint service requests, which resulted in impact.<\/p>\n<p>  Next steps:<br \/>  &#8211; We&#8217;re reviewing our code change check and implementation processes to improve how we detect potential operating system issues and prevent similar service incidents in the future.<\/p>\n<p>  This is the final update for the event.<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>DZ1266872 | Microsoft Defender XDR | Admins may notice excessive memory usage on their Windows Server 2016 mac [&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-15889","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/15889","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=15889"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/15889\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=15889"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=15889"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=15889"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}