{"id":19082,"date":"2026-10-20T06:01:17","date_gmt":"2026-10-19T21:01:17","guid":{"rendered":"https:\/\/m365jp.net\/?p=19082"},"modified":"2026-10-20T06:02:26","modified_gmt":"2026-10-19T21:02:26","slug":"servicerestored-mo1515549-microsoft-365-suite-users-and-admins-couldnt-view-or-manage-device-group-configurations-through-the-microsoft-defender-portal","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-10-20-servicerestored-mo1515549-microsoft-365-suite-users-and-admins-couldnt-view-or-manage-device-group-configurations-through-the-microsoft-defender-portal","title":{"rendered":"[serviceRestored] MO1515549 | Microsoft 365 suite | Users and admins couldn’t view or manage device group configurations through the Microsoft Defender portal"},"content":{"rendered":"
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MO1515549 | Microsoft 365 suite | Users and admins couldn’t view or manage device group configurations through the Microsoft Defender portal<\/th>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n\n\n\n\n\n\n\n\n\n\n
Status<\/th>\nserviceRestored<\/td>\n<\/tr>\n
Classification<\/th>\nadvisory<\/td>\n<\/tr>\n
User Impact<\/th>\nUsers and admins couldn’t view or manage device group configurations through the Microsoft Defender portal.<\/td>\n<\/tr>\n
Last Updated<\/th>\n10\/19\/2026 20:03:04<\/td>\n<\/tr>\n
Start Time<\/th>\n10\/19\/2026 18:35:18<\/td>\n<\/tr>\n
End Time<\/th>\n10\/19\/2026 19:54:49<\/td>\n<\/tr>\n
Latest Message<\/th>\nTitle: Users and admins couldn’t view or manage device group configurations through the Microsoft Defender portal <\/p>\n

User impact: Users and admins couldn’t view or manage device group configurations through the Microsoft Defender portal. <\/p>\n

More info: The device groups page in the Microsoft Defender portal wasn’t loading for affected users and admins. Core security operations such as detection, alerting, and incident response weren’t affected. <\/p>\n

Final status: Our investigation has further determined it was specifically a code issue that was occurring within the device groups page and caused a component in the page rendering process to fail to handle the response correctly and resulted in the page to crash. We’ve developed and deployed a fix to remediate the impact and confirmed with some affected users that the issue is resolved. <\/p>\n

Scope of impact: Users and admins who attempted to view or manage device group configurations through the Microsoft Defender portal may have been affected. <\/p>\n

Start time: Monday, October 19, 2026, at 9:00 AM UTC <\/p>\n

End time: Monday, October 19, 2026, at 7:51 PM UTC <\/p>\n

Root cause: A code issue in the device groups page was causing a component in the page rendering process to fail to handle the response correctly and was resulting in the page to crash. <\/p>\n

Next steps:
– We’re investigating the code issue to pinpoint why it wasn’t caught during the testing and validation phase so that we can prevent impact to viewing or managing device group configurations through the Microsoft Defender portal in the future. <\/p>\n

This is the final update for the event.<\/td>\n<\/tr>\n

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MO1515549 | Microsoft 365 suite | Users and admins couldn’t view or manage device group configurations t […]<\/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-19082","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/19082","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=19082"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/19082\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=19082"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=19082"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=19082"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}