{"id":14645,"date":"2026-01-23T14:00:54","date_gmt":"2026-01-23T05:00:54","guid":{"rendered":"https:\/\/m365jp.net\/?p=14645"},"modified":"2026-01-23T14:01:54","modified_gmt":"2026-01-23T05:01:54","slug":"servicedegradation-mo1221364-microsoft-365-suite-users-may-be-seeing-degraded-service-functionality-or-be-unable-to-access-multiple-microsoft-365-services-9","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-01-23-servicedegradation-mo1221364-microsoft-365-suite-users-may-be-seeing-degraded-service-functionality-or-be-unable-to-access-multiple-microsoft-365-services-9","title":{"rendered":"[serviceDegradation] MO1221364 | Microsoft 365 suite | Users may be seeing degraded service functionality or be unable to access multiple Microsoft 365 services"},"content":{"rendered":"
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MO1221364 | Microsoft 365 suite | Users may be seeing degraded service functionality or be unable to access multiple Microsoft 365 services<\/th>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n\n\n\n\n\n\n\n\n\n\n
Status<\/th>\nserviceDegradation<\/td>\n<\/tr>\n
Classification<\/th>\nincident<\/td>\n<\/tr>\n
User Impact<\/th>\nUsers may be seeing degraded service functionality or be unable to access multiple Microsoft 365 services.<\/td>\n<\/tr>\n
Last Updated<\/th>\n01\/23\/2026 04:29:38<\/td>\n<\/tr>\n
Start Time<\/th>\n01\/22\/2026 19:33:29<\/td>\n<\/tr>\n
End Time<\/th>\n<\/td>\n<\/tr>\n
Latest Message<\/th>\nTitle: Users may be seeing degraded service functionality or be unable to access multiple Microsoft 365 services<\/p>\n

User impact: Users may be seeing degraded service functionality or be unable to access multiple Microsoft 365 services.<\/p>\n

More info: Some of the impacted service functions include, but may not be limited to:
– Sending and receiving email through Exchange Online, including notification email from Microsoft Viva Engage as well as subscription email for Microsoft Fabric users. Users may be receiving a “451 4.3.2 temporary server issue” error message when attempting to send or receive email through Outlook.
– Collecting message traces in Exchange Online.
– Searching within SharePoint Online, Microsoft OneDrive, and\/or Microsoft Teams.
– Accessing the service portals, including Microsoft Purview, Microsoft Defender XDR, and the Microsoft 365 admin center.
– Creating chats, meetings, teams, channels or adding members in Microsoft Teams. Additionally, some users may be intermittently unable to create breakout rooms or Microsoft Teams live events.
– Receiving presence or location information in Microsoft Teams.
– Existing or new meeting options for Facilitator in Teams may not be honored.
– Applying and managing sensitivity labels, interactive operations on reports, and artifacts with sensitivity labels in Microsoft Fabric.
– Print registration and printer jobs may fail in Universal Print.
– Microsoft ToDo users may experience synchronization issues, which can prevent tasks from updating across devices. Additionally, tasks created in Shared Lists may not appear for collaborators.
– Microsoft Defender for Cloud Apps users may be unable to view insights or view, create, or update OAuth enabled app policies. Reporting data may also appear blank, even though no error is shown.
– Microsoft Defender for Office (MDO) users may experience limited access to administrative and SOC experiences, including the quarantine portal and Safe Links protection. As basic mail flow continues to be restored, these associated experiences are expected to resume normal operation.
– Microsoft Power Automate users may be unable to utilize Power Automate connectors including Office 365, Office 365 Users, Office 365 Groups, and Office 365 Groups Mail. <\/p>\n

Current status: We\u2019ve identified elevated service load combined with temporary capacity constraints during maintenance resulted in impact. We\u2019re seeing positive signs of recovery in mail delivery, and mitigation actions are in place to better manage service load. While some connectivity impact remains between Microsoft Defender for Office, Microsoft Purview, and Exchange Online, and DNS lookup failures, engineers are actively working to restore full functionality. <\/p>\n

Scope of impact: Any users served through an affected section of service infrastructure in the North America region may be intermittently impacted. This could affect users located in Asia-Pacific, Europe, or Latin America.<\/p>\n

Root cause: We’ve identified that the issue was caused by elevated service load resulting from reduced capacity during maintenance for a subset of North America hosted infrastructure.<\/p>\n

Next update by: Friday, January 23, 2026, at 5:30 AM UTC<\/td>\n<\/tr>\n

Machine Translation<\/th>\n\u30bf\u30a4\u30c8\u30eb:\u30e6\u30fc\u30b6\u30fc\u306f\u30b5\u30fc\u30d3\u30b9\u306e\u6a5f\u80fd\u4f4e\u4e0b\u3092\u76ee\u306b\u3057\u305f\u308a\u3001\u8907\u6570\u306eMicrosoft 365\u30b5\u30fc\u30d3\u30b9\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u306a\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059<\/p>\n

\u30e6\u30fc\u30b6\u30fc\u3078\u306e\u5f71\u97ff:\u30e6\u30fc\u30b6\u30fc\u306f\u30b5\u30fc\u30d3\u30b9\u306e\u6a5f\u80fd\u4f4e\u4e0b\u3092\u76ee\u306b\u3057\u305f\u308a\u3001\u8907\u6570\u306eMicrosoft 365\u30b5\u30fc\u30d3\u30b9\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u306a\u304f\u306a\u3063\u305f\u308a\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u8a73\u7d30\u60c5\u5831:\u5f71\u97ff\u3092\u53d7\u3051\u308b\u30b5\u30fc\u30d3\u30b9\u6a5f\u80fd\u306b\u306f\u4ee5\u4e0b\u304c\u542b\u307e\u308c\u307e\u3059\u304c\u3001\u3053\u308c\u3089\u306b\u9650\u5b9a\u3055\u308c\u306a\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059:
– Exchange Online\u3092\u901a\u3058\u305f\u30e1\u30fc\u30eb\u306e\u9001\u53d7\u4fe1(Microsoft Viva Engage\u304b\u3089\u306e\u901a\u77e5\u30e1\u30fc\u30eb\u3084Microsoft Fabric\u30e6\u30fc\u30b6\u30fc\u5411\u3051\u306e\u30b5\u30d6\u30b9\u30af\u30ea\u30d7\u30b7\u30e7\u30f3\u30e1\u30fc\u30eb\u3092\u542b\u3080)Outlook\u3092\u901a\u3058\u3066\u30e1\u30fc\u30eb\u306e\u9001\u53d7\u4fe1\u3092\u8a66\u307f\u308b\u969b\u306b\u300c451 4.3.2 \u4e00\u6642\u7684\u306a\u30b5\u30fc\u30d0\u30fc\u554f\u984c\u300d\u3068\u3044\u3046\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u8868\u793a\u3055\u308c\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002
– Exchange Online\u3067\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u30c8\u30ec\u30fc\u30b9\u306e\u53ce\u96c6\u3002
– SharePoint Online\u3001Microsoft OneDrive\u3001\u304a\u3088\u3073\/\u307e\u305f\u306fMicrosoft Teams\u5185\u3067\u306e\u691c\u7d22\u3002
– Microsoft Purview\u3001Microsoft Defender XDR\u3001Microsoft 365\u7ba1\u7406\u30bb\u30f3\u30bf\u30fc\u3092\u542b\u3080\u30b5\u30fc\u30d3\u30b9\u30dd\u30fc\u30bf\u30eb\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3002
– \u30c1\u30e3\u30c3\u30c8\u3001\u4f1a\u8b70\u3001Teams\u3001\u30c1\u30e3\u30f3\u30cd\u30eb\u306e\u4f5c\u6210\u3001Microsoft Teams\u5185\u3067\u306e\u30e1\u30f3\u30d0\u30fc\u8ffd\u52a0\u3002\u3055\u3089\u306b\u3001\u4e00\u90e8\u306e\u30e6\u30fc\u30b6\u30fc\u306f\u65ad\u7d9a\u7684\u306b\u30d6\u30ec\u30a4\u30af\u30a2\u30a6\u30c8\u30eb\u30fc\u30e0\u3084Microsoft Teams\u306e\u30e9\u30a4\u30d6\u30a4\u30d9\u30f3\u30c8\u3092\u4f5c\u6210\u3067\u304d\u306a\u304f\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002
– Microsoft Teams\u3067\u306e\u5728\u5728\u60c5\u5831\u3084\u4f4d\u7f6e\u60c5\u5831\u306e\u53d7\u4fe1\u3002
– \u30c1\u30fc\u30e0\u5185\u306e\u30d5\u30a1\u30b7\u30ea\u30c6\u30fc\u30bf\u30fc\u306e\u65e2\u5b58\u307e\u305f\u306f\u65b0\u898f\u30df\u30fc\u30c6\u30a3\u30f3\u30b0\u30aa\u30d7\u30b7\u30e7\u30f3\u306f\u3001\u627f\u8a8d\u3055\u308c\u306a\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002
– Microsoft Fabric\u306b\u304a\u3051\u308b\u30bb\u30f3\u30b7\u30c6\u30a3\u30d6\u30e9\u30d9\u30eb\u306e\u9069\u7528\u304a\u3088\u3073\u7ba1\u7406\u3001\u30ec\u30dd\u30fc\u30c8\u4e0a\u306e\u30a4\u30f3\u30bf\u30e9\u30af\u30c6\u30a3\u30d6\u64cd\u4f5c\u3001\u611f\u5ea6\u30e9\u30d9\u30eb\u3092\u6301\u3064\u30a2\u30fc\u30c6\u30a3\u30d5\u30a1\u30af\u30c8\u3002
– Universal Print\u3067\u306f\u5370\u5237\u767b\u9332\u3084\u30d7\u30ea\u30f3\u30bf\u30fc\u30b8\u30e7\u30d6\u304c\u5931\u6557\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002
– Microsoft ToDo\u30e6\u30fc\u30b6\u30fc\u306f\u540c\u671f\u306e\u554f\u984c\u3092\u7d4c\u9a13\u3057\u3001\u30c7\u30d0\u30a4\u30b9\u9593\u3067\u30bf\u30b9\u30af\u306e\u66f4\u65b0\u304c\u59a8\u3052\u3089\u308c\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3055\u3089\u306b\u3001\u5171\u6709\u30ea\u30b9\u30c8\u3067\u4f5c\u6210\u3055\u308c\u305f\u30bf\u30b9\u30af\u306f\u30b3\u30e9\u30dc\u30ec\u30fc\u30bf\u30fc\u306b\u8868\u793a\u3055\u308c\u306a\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002
– Microsoft Defender for Cloud Apps \u30e6\u30fc\u30b6\u30fc\u306f\u30a4\u30f3\u30b5\u30a4\u30c8\u3092\u95b2\u89a7\u3057\u305f\u308a\u3001OAuth \u5bfe\u5fdc\u306e\u30a2\u30d7\u30ea\u30dd\u30ea\u30b7\u30fc\u306e\u95b2\u89a7\u3001\u4f5c\u6210\u3001\u66f4\u65b0\u304c\u3067\u304d\u306a\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u30a8\u30e9\u30fc\u304c\u8868\u793a\u3055\u308c\u3066\u3044\u306a\u3044\u306b\u3082\u304b\u304b\u308f\u3089\u305a\u3001\u30ec\u30dd\u30fc\u30c8\u30c7\u30fc\u30bf\u304c\u7a7a\u767d\u3068\u3057\u3066\u8868\u793a\u3055\u308c\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002
– Microsoft Defender for Office(MDO)\u30e6\u30fc\u30b6\u30fc\u306f\u3001\u9694\u96e2\u30dd\u30fc\u30bf\u30eb\u3084\u30bb\u30fc\u30d5\u30ea\u30f3\u30af\u4fdd\u8b77\u3092\u542b\u3080\u7ba1\u7406\u304a\u3088\u3073SOC\u306e\u4f53\u9a13\u3078\u306e\u30a2\u30af\u30bb\u30b9\u304c\u5236\u9650\u3055\u308c\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u57fa\u672c\u7684\u306a\u90f5\u4fbf\u7269\u6d41\u304c\u56de\u5fa9\u3057\u7d9a\u3051\u308b\u306b\u3064\u308c\u3066\u3001\u3053\u308c\u3089\u306e\u95a2\u9023\u4f53\u9a13\u306f\u901a\u5e38\u306e\u904b\u7528\u304c\u518d\u958b\u3055\u308c\u308b\u3068\u4e88\u60f3\u3055\u308c\u3066\u3044\u307e\u3059\u3002
– Microsoft Power Automate\u30e6\u30fc\u30b6\u30fc\u306f\u3001Office 365\u3001Office 365 Users\u3001Office 365 Groups\u3001Office 365 Groups Mail\u306a\u3069\u306ePower Automate\u30b3\u30cd\u30af\u30bf\u3092\u5229\u7528\u3067\u304d\u306a\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u73fe\u72b6:\u4fdd\u5b88\u4e2d\u306e\u30b5\u30fc\u30d3\u30b9\u8ca0\u8377\u306e\u4e0a\u6607\u3068\u4e00\u6642\u7684\u306a\u5bb9\u91cf\u5236\u7d04\u304c\u5f71\u97ff\u3092\u53ca\u307c\u3057\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u307e\u3057\u305f\u3002\u90f5\u4fbf\u914d\u9054\u306b\u304a\u3044\u3066\u56de\u5fa9\u306e\u597d\u5146\u3057\u304c\u898b\u3048\u3066\u304a\u308a\u3001\u30b5\u30fc\u30d3\u30b9\u8ca0\u8377\u3092\u3088\u308a\u9069\u5207\u306b\u7ba1\u7406\u3059\u308b\u305f\u3081\u306e\u5bfe\u7b56\u304c\u8b1b\u3058\u3089\u308c\u3066\u3044\u307e\u3059\u3002Microsoft Defender for Office\u3001Microsoft Purview\u3001Exchange Online\u9593\u3067\u63a5\u7d9a\u6027\u306e\u5f71\u97ff\u3084DNS\u691c\u7d22\u306e\u5931\u6557\u304c\u6b8b\u308b\u3082\u306e\u306e\u3001\u30a8\u30f3\u30b8\u30cb\u30a2\u305f\u3061\u306f\u5b8c\u5168\u306a\u6a5f\u80fd\u56de\u5fa9\u306b\u5411\u3051\u3066\u7a4d\u6975\u7684\u306b\u53d6\u308a\u7d44\u3093\u3067\u3044\u307e\u3059\u3002<\/p>\n

\u5f71\u97ff\u7bc4\u56f2:\u5317\u7c73\u5730\u57df\u306e\u5f71\u97ff\u3092\u53d7\u3051\u305f\u30b5\u30fc\u30d3\u30b9\u30a4\u30f3\u30d5\u30e9\u306e\u4e00\u90e8\u3092\u901a\u3058\u3066\u30b5\u30fc\u30d3\u30b9\u3092\u53d7\u3051\u308b\u30e6\u30fc\u30b6\u30fc\u306f\u65ad\u7d9a\u7684\u306b\u5f71\u97ff\u3092\u53d7\u3051\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u30a2\u30b8\u30a2\u592a\u5e73\u6d0b\u3001\u30e8\u30fc\u30ed\u30c3\u30d1\u3001\u307e\u305f\u306f\u30e9\u30c6\u30f3\u30a2\u30e1\u30ea\u30ab\u306b\u3044\u308b\u30e6\u30fc\u30b6\u30fc\u306b\u5f71\u97ff\u3092\u53ca\u307c\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u6839\u672c\u539f\u56e0:\u554f\u984c\u306f\u3001\u5317\u7c73\u306e\u30db\u30b9\u30c8\u30a4\u30f3\u30d5\u30e9\u306e\u4e00\u90e8\u3067\u4fdd\u5b88\u4e2d\u306e\u5bb9\u91cf\u6e1b\u5c11\u306b\u3088\u308b\u30b5\u30fc\u30d3\u30b9\u8ca0\u8377\u306e\u4e0a\u6607\u304c\u539f\u56e0\u3067\u3042\u308b\u3053\u3068\u3092\u7279\u5b9a\u3057\u307e\u3057\u305f\u3002<\/p>\n

\u6b21\u56de\u66f4\u65b0:2026\u5e741\u670823\u65e5\u91d1\u66dc\u65e5 \u5348\u524d5:30 UTC<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

MO1221364 | Microsoft 365 suite | Users may be seeing degraded service functionality or be unable to access mu […]<\/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-14645","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/14645","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=14645"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/14645\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=14645"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=14645"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=14645"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}