{"id":17075,"date":"2026-06-29T21:01:25","date_gmt":"2026-06-29T12:01:25","guid":{"rendered":"https:\/\/m365jp.net\/?p=17075"},"modified":"2026-06-29T21:01:44","modified_gmt":"2026-06-29T12:01:44","slug":"servicerestored-mo1331639-microsoft-365-suite-issue-with-webhook-based-task-notifications-in-microsoft-to-do","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-06-29-servicerestored-mo1331639-microsoft-365-suite-issue-with-webhook-based-task-notifications-in-microsoft-to-do","title":{"rendered":"[serviceRestored] MO1331639 | Microsoft 365 suite | Issue with webhook-based task notifications in Microsoft To Do"},"content":{"rendered":"
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MO1331639 | Microsoft 365 suite | Issue with webhook-based task notifications in Microsoft To Do<\/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 are unable to receive webhook-based task notifications in Microsoft To Do.<\/td>\n<\/tr>\n
Last Updated<\/th>\n06\/29\/2026 11:28:13<\/td>\n<\/tr>\n
Start Time<\/th>\n06\/02\/2026 13:55:00<\/td>\n<\/tr>\n
End Time<\/th>\n06\/26\/2026 09:00:00<\/td>\n<\/tr>\n
Latest Message<\/th>\nTitle: Issue with webhook-based task notifications in Microsoft To Do<\/p>\n

User impact: Users may have been unable to receive webhook-based task notifications in Microsoft To Do.<\/p>\n

More info: This issue may have affected any webhook-based task notification in Microsoft To Do:<\/p>\n

– Any webhook notification delivered to your organization’s registered notificationUrl endpoints that was setup using Microsoft Graph: learn.microsoft.com\/en-us\/graph\/change-notifications-with-resource-data?tabs=csharp<\/a><\/p>\n

– Any automation or workflow that depended on receiving real-time task change callbacks
If your organization relied on webhook notifications for task automation:
– Consider temporary polling via GET requests to \/me\/todo\/lists\/{listId}\/tasks as a workaround: learn.microsoft.com\/en-us\/graph\/api\/resources\/todo-overview?view=graph-rest-1.0<\/a><\/p>\n

Final status: We’ve completed the deployment of the long-term fix to the affected infrastructure, and after a period of monitoring, we’ve confirmed the functionality of webhook-based task notifications in Microsoft To Do is fully restored.<\/p>\n

Scope of impact: Your organization was impacted by this event, and this issue may have affected any user within your organization.<\/p>\n

Impact start time: Saturday, May 30, 2026 at 9:00 AM UTC<\/p>\n

Impact end time: Friday, June 26, 2026 at 9:00 AM UTC<\/p>\n

Next steps:
– We’re reviewing how we conduct configuration changes to prevent similar events from occurring in future.<\/p>\n

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

Machine Translation<\/th>\n\u30bf\u30a4\u30c8\u30eb:Microsoft To Do\u306b\u304a\u3051\u308b\u30a6\u30a7\u30d6\u30d5\u30c3\u30af\u30d9\u30fc\u30b9\u306e\u30bf\u30b9\u30af\u901a\u77e5\u306e\u554f\u984c<\/p>\n

\u30e6\u30fc\u30b6\u30fc\u3078\u306e\u5f71\u97ff:Microsoft To Do\u3067Webhook\u30d9\u30fc\u30b9\u306e\u30bf\u30b9\u30af\u901a\u77e5\u3092\u53d7\u3051\u53d6\u308c\u306a\u304b\u3063\u305f\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u8a73\u7d30\u60c5\u5831:\u3053\u306e\u554f\u984c\u306fMicrosoft To Do\u306eWebhook\u30d9\u30fc\u30b9\u306e\u30bf\u30b9\u30af\u901a\u77e5\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u305f\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059:<\/p>\n

– Microsoft Graph\u3092\u7528\u3044\u3066\u7d44\u7e54\u306e\u767b\u9332\u901a\u77e5URL\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u306b\u914d\u4fe1\u3055\u308c\u305f\u30a6\u30a7\u30d6\u30d5\u30c3\u30af\u901a\u77e5:https:\/\/learn.microsoft.com\/en-us\/graph\/change-notifications-with-resource-data?tabs=csharp<\/p>\n

– \u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u306e\u30bf\u30b9\u30af\u5909\u66f4\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u53d7\u4fe1\u306b\u4f9d\u5b58\u3057\u305f\u81ea\u52d5\u5316\u3084\u30ef\u30fc\u30af\u30d5\u30ed\u30fc
\u3082\u3057\u3042\u306a\u305f\u306e\u7d44\u7e54\u304c\u30bf\u30b9\u30af\u81ea\u52d5\u5316\u306e\u305f\u3081\u306b\u30a6\u30a7\u30d6\u30d5\u30c3\u30af\u901a\u77e5\u306b\u4f9d\u5b58\u3057\u3066\u3044\u308b\u306a\u3089:
– \u56de\u907f\u7b56\u3068\u3057\u3066\u3001\/me\/todo\/lists\/lists\/{listId}\/tasks\u3078\u306eGET\u30ea\u30af\u30a8\u30b9\u30c8\u306b\u3088\u308b\u4e00\u6642\u7684\u306a\u30dd\u30fc\u30ea\u30f3\u30b0\u3092\u691c\u8a0e\u3057\u3066\u304f\u3060\u3055\u3044:https:\/\/learn.microsoft.com\/en-us\/graph\/api\/resources\/todo-overview?view=graph-rest-1.0<\/p>\n

\u6700\u7d42\u72b6\u6cc1:\u5f71\u97ff\u3092\u53d7\u3051\u305f\u30a4\u30f3\u30d5\u30e9\u3078\u306e\u9577\u671f\u7684\u306a\u4fee\u6b63\u306e\u5c55\u958b\u3092\u5b8c\u4e86\u3057\u3001\u76e3\u8996\u671f\u9593\u3092\u7d4c\u3066\u3001Microsoft To Do\u306eWebhook\u30d9\u30fc\u30b9\u306e\u30bf\u30b9\u30af\u901a\u77e5\u6a5f\u80fd\u304c\u5b8c\u5168\u306b\u5fa9\u6d3b\u3057\u305f\u3053\u3068\u304c\u78ba\u8a8d\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n

\u5f71\u97ff\u7bc4\u56f2:\u8cb4\u7d44\u7e54\u306f\u3053\u306e\u30a4\u30d9\u30f3\u30c8\u306e\u5f71\u97ff\u3092\u53d7\u3051\u3066\u304a\u308a\u3001\u3053\u306e\u554f\u984c\u306f\u7d44\u7e54\u5185\u306e\u3069\u306e\u30e6\u30fc\u30b6\u30fc\u306b\u3082\u5f71\u97ff\u3092\u53ca\u307c\u3057\u305f\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u30a4\u30f3\u30d1\u30af\u30c8\u958b\u59cb\u6642\u523b:2026\u5e745\u670830\u65e5\u571f\u66dc\u65e5 \u5348\u524d9\u6642 UTC<\/p>\n

\u885d\u7a81\u7d42\u4e86\u6642\u523b:2026\u5e746\u670826\u65e5\u91d1\u66dc\u65e5 \u5348\u524d9\u6642 UTC<\/p>\n

\u6b21\u306e\u30b9\u30c6\u30c3\u30d7:
– \u4eca\u5f8c\u540c\u69d8\u306e\u4e8b\u614b\u304c\u8d77\u3053\u3089\u306a\u3044\u3088\u3046\u306b\u3001\u8a2d\u5b9a\u5909\u66f4\u306e\u5b9f\u65bd\u65b9\u6cd5\u3092\u898b\u76f4\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u3053\u308c\u304c\u3053\u306e\u4e8b\u4ef6\u306e\u6700\u7d42\u66f4\u65b0\u3067\u3059\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

MO1331639 | Microsoft 365 suite | Issue with webhook-based task notifications in Microsoft To Do Status servic […]<\/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-17075","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/17075","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=17075"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/17075\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=17075"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=17075"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=17075"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}