{"id":18379,"date":"2026-09-05T03:01:55","date_gmt":"2026-09-04T18:01:55","guid":{"rendered":"https:\/\/m365jp.net\/?p=18379"},"modified":"2026-09-05T03:15:31","modified_gmt":"2026-09-04T18:15:31","slug":"servicerestored-sp1464785-sharepoint-online-some-users-may-be-unable-to-access-sharepoint-online-sites-configured-with-authentication-context","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-09-05-servicerestored-sp1464785-sharepoint-online-some-users-may-be-unable-to-access-sharepoint-online-sites-configured-with-authentication-context","title":{"rendered":"[serviceRestored] SP1464785 | SharePoint Online | Some users may be unable to access SharePoint Online sites configured with Authentication Context"},"content":{"rendered":"
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SP1464785 | SharePoint Online | Some users may be unable to access SharePoint Online sites configured with Authentication Context<\/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>\nincident<\/td>\n<\/tr>\n
User Impact<\/th>\nUsers may have been unable to access SharePoint Online sites configured with Authentication Context.<\/td>\n<\/tr>\n
Last Updated<\/th>\n09\/04\/2026 17:22:06<\/td>\n<\/tr>\n
Start Time<\/th>\n08\/23\/2026 02:38:00<\/td>\n<\/tr>\n
End Time<\/th>\n09\/04\/2026 17:18:41<\/td>\n<\/tr>\n
Latest Message<\/th>\nTitle: Some users may be unable to access SharePoint Online sites configured with Authentication Context <\/p>\n

User impact: Users may have been unable to access SharePoint Online sites configured with Authentication Context. <\/p>\n

More info: Specifically, users were unable to access SharePoint Online sites configured with Authentication Context through sensitivity labels.<\/p>\n

Users received the following error message:
“Server Error in ‘\/’ Application.”<\/p>\n

As a workaround, users may have been able to temporarily access the affected content by first clearing internet browser cookies and navigating to the root site collection before opening the direct link. Users could have also opened a new browser tab on the same session and access the site or used a direct link. <\/p>\n

Final status: After confirming that our reversion of the code update to the SharePoint Online authentication process completed as expected and was available in all environments, we validated with a portion of impacted users that access to SharePoint Online sites configured with Authentication Context has been restored. <\/p>\n

Scope of impact: Some users attempting to access SharePoint Online sites configured with Authentication Context through sensitivity labels may have been impacted. <\/p>\n

Start time: Sunday, August 23, 2026, at 2:38 AM UTC <\/p>\n

End time: Friday, September 4, 2026, at 5:00 PM UTC <\/p>\n

Root cause: A recent SharePoint Online code change intended to update authentication processing resulted in Authentication Context requests not being processed as expected, preventing some users from accessing affected sites. <\/p>\n

Next steps: – We’re continuing to optimize our quality assurance processes to minimize user impact while ensuring important service health updates are deployed as efficiently as possible.<\/td>\n<\/tr>\n

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SP1464785 | SharePoint Online | Some users may be unable to access SharePoint Online sites configured with Aut […]<\/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-18379","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/18379","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=18379"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/18379\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=18379"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=18379"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=18379"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}