{"id":18087,"date":"2026-08-26T19:04:58","date_gmt":"2026-08-26T10:04:58","guid":{"rendered":"https:\/\/m365jp.net\/?p=18087"},"modified":"2026-08-26T19:08:02","modified_gmt":"2026-08-26T10:08:02","slug":"servicerestored-sp1461217-sharepoint-online-guest-users-were-unable-to-access-sharepoint-online-sites-connected-to-microsoft-teams","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-08-26-servicerestored-sp1461217-sharepoint-online-guest-users-were-unable-to-access-sharepoint-online-sites-connected-to-microsoft-teams","title":{"rendered":"[serviceRestored] SP1461217 | SharePoint Online | Guest users were unable to access SharePoint Online sites connected to Microsoft Teams"},"content":{"rendered":"
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SP1461217 | SharePoint Online | Guest users were unable to access SharePoint Online sites connected to Microsoft Teams<\/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>\nGuest users were unable to access SharePoint Online sites connected to Microsoft Teams.<\/td>\n<\/tr>\n
Last Updated<\/th>\n08\/26\/2026 09:31:34<\/td>\n<\/tr>\n
Start Time<\/th>\n08\/20\/2026 07:30:00<\/td>\n<\/tr>\n
End Time<\/th>\n08\/25\/2026 15:54:00<\/td>\n<\/tr>\n
Latest Message<\/th>\nTitle: Guest users were unable to access SharePoint Online sites connected to Microsoft Teams<\/p>\n

User impact: Guest users were unable to access SharePoint Online sites connected to Microsoft Teams.<\/p>\n

More info: Specifically, guest users were redirected to an AccessDenied.aspx page when attempting to access SharePoint Online sites where access is granted through Microsoft 365 Groups.<\/p>\n

As a potential workaround, admins could have manually add affected guest users directly to the SharePoint Members group instead of relying on Microsoft 365 Group membership propagation.<\/p>\n

Final status: We’ve completed a period of monitoring service telemetry, and we’ve observed the restoration of service availability to normal levels. Additionally, during this time, we’ve received multiple reports from previously affected customers that they’re experiencing relief from impact, and as such, we’ve determined this incident is resolved.<\/p>\n

Scope of impact: This issue could have impacted any guest users attempting to access SharePoint Online sites where access is granted through Microsoft 365 Groups.<\/p>\n

Start time: Thursday, August 20, 2026, at 7:30 AM UTC<\/p>\n

End time: Tuesday, August 25, 2026, at 3:54 PM UTC<\/p>\n

Preliminary root cause: A recently deployed change interacted with dynamic claims process, causing impact.<\/p>\n

Next steps:
– We’re conducting a review of our internal change management processes to ensure the appropriate controls are in place and to reduce the likelihood of similar issues occurring in the future.<\/p>\n

We’ll provide a preliminary Post-Incident Report within two business days and a final Post-Incident Report within five business days.<\/td>\n<\/tr>\n

Machine Translation<\/th>\n\u30bf\u30a4\u30c8\u30eb:\u30b2\u30b9\u30c8\u30e6\u30fc\u30b6\u30fc\u306fMicrosoft Teams\u306b\u63a5\u7d9a\u3055\u308c\u305fSharePoint Online\u30b5\u30a4\u30c8\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u307e\u305b\u3093\u3067\u3057\u305f<\/p>\n

\u30e6\u30fc\u30b6\u30fc\u3078\u306e\u5f71\u97ff:\u30b2\u30b9\u30c8\u30e6\u30fc\u30b6\u30fc\u306fMicrosoft Teams\u306b\u63a5\u7d9a\u3055\u308c\u305fSharePoint Online\u30b5\u30a4\u30c8\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u307e\u305b\u3093\u3067\u3057\u305f\u3002<\/p>\n

\u8a73\u7d30\u60c5\u5831:\u5177\u4f53\u7684\u306b\u306f\u3001\u30b2\u30b9\u30c8\u30e6\u30fc\u30b6\u30fc\u306fMicrosoft 365 Groups\u7d4c\u7531\u3067\u30a2\u30af\u30bb\u30b9\u304c\u8a8d\u3081\u3089\u308c\u308bSharePoint Online\u30b5\u30a4\u30c8\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3088\u3046\u3068\u3057\u305f\u969b\u306bAccessDenied.aspx\u30da\u30fc\u30b8\u306b\u30ea\u30c0\u30a4\u30ec\u30af\u30c8\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n

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\u6700\u7d42\u72b6\u6cc1:\u30b5\u30fc\u30d3\u30b9\u30c6\u30ec\u30e1\u30c8\u30ea\u30fc\u306e\u76e3\u8996\u671f\u9593\u3092\u5b8c\u4e86\u3057\u3001\u30b5\u30fc\u30d3\u30b9\u304c\u901a\u5e38\u30ec\u30d9\u30eb\u306b\u56de\u5fa9\u3057\u305f\u306e\u3092\u78ba\u8a8d\u3057\u307e\u3057\u305f\u3002\u3055\u3089\u306b\u3001\u3053\u306e\u671f\u9593\u4e2d\u306b\u3001\u4ee5\u524d\u306b\u5f71\u97ff\u3092\u53d7\u3051\u305f\u304a\u5ba2\u69d8\u304b\u3089\u885d\u6483\u304b\u3089\u306e\u8efd\u6e1b\u3092\u7d4c\u9a13\u3057\u3066\u3044\u308b\u3068\u306e\u8907\u6570\u306e\u5831\u544a\u3092\u53d7\u3051\u3066\u304a\u308a\u3001\u3053\u306e\u30a4\u30f3\u30b7\u30c7\u30f3\u30c8\u306f\u89e3\u6c7a\u3057\u305f\u3068\u5224\u65ad\u3057\u307e\u3057\u305f\u3002<\/p>\n

\u5f71\u97ff\u7bc4\u56f2:\u3053\u306e\u554f\u984c\u306f\u3001Microsoft 365\u30b0\u30eb\u30fc\u30d7\u3092\u901a\u3058\u3066\u30a2\u30af\u30bb\u30b9\u304c\u8a8d\u3081\u3089\u308c\u3066\u3044\u308bSharePoint Online\u30b5\u30a4\u30c8\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3088\u3046\u3068\u3059\u308b\u30b2\u30b9\u30c8\u30e6\u30fc\u30b6\u30fc\u306b\u5f71\u97ff\u3092\u53ca\u307c\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u958b\u59cb\u6642\u9593:2026\u5e748\u670820\u65e5\u6728\u66dc\u65e5 \u5348\u524d7\u664230\u5206 UTC<\/p>\n

\u7d42\u4e86\u6642\u523b:2026\u5e748\u670825\u65e5\u706b\u66dc\u65e5 15:54 UTC<\/p>\n

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\u6b21\u306e\u30b9\u30c6\u30c3\u30d7:
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SP1461217 | SharePoint Online | Guest users were unable to access SharePoint Online sites connected to Microso […]<\/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-18087","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/18087","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=18087"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/18087\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=18087"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=18087"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=18087"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}