{"id":14630,"date":"2026-01-23T06:01:21","date_gmt":"2026-01-22T21:01:21","guid":{"rendered":"https:\/\/m365jp.net\/?p=14630"},"modified":"2026-01-23T06:06:08","modified_gmt":"2026-01-22T21:06:08","slug":"servicedegradation-mo1221364-microsoft-365-suite-users-may-be-seeing-degraded-service-functionality-or-be-unable-to-access-multiple-microsoft-365-services","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","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\/22\/2026 20:46:37<\/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: More info: Users may be receiving a “451 4.3.2 temporary server issue” error message when attempting to send or receive email through Outlook.<\/p>\n

Some of the impacted service functions include, but may not be limited to:
– Sending and receiving email through Exchange Online, including notification emails from Microsoft Viva Engage.
– Collecting message traces may be delayed or fail.
– Searches within SharePoint Online and\/or Microsoft OneDrive mail be delayed or fail to complete.
– Accessing the service portals, including Microsoft Purview, Microsoft Defender XDR, and the Microsoft 365 admin center.<\/p>\n

Current status: We’re continuing to review what actions are required to restore the affected infrastructure to a heathy state and rebalance the service traffic to achieve recovery.<\/p>\n

Scope of impact: Any users served through an affected section of service infrastructure in the North America region may be intermittently impacted.<\/p>\n

Root cause: A portion of dependent service infrastructure in the North America region isn’t processing traffic as expected.<\/p>\n

Next update by: Thursday, January 22, 2026, at 11:00 PM 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:\u8a73\u7d30\u60c5\u5831:Outlook\u7d4c\u7531\u3067\u30e1\u30fc\u30eb\u306e\u9001\u53d7\u4fe1\u3092\u8a66\u307f\u308b\u969b\u306b\u300c451 4.3.2 \u4e00\u6642\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<\/p>\n

\u5f71\u97ff\u3092\u53d7\u3051\u308b\u30b5\u30fc\u30d3\u30b9\u6a5f\u80fd\u306e\u4e00\u90e8\u306b\u306f\u3001\u4ee5\u4e0b\u304c\u542b\u307e\u308c\u307e\u3059\u304c\u3001\u3053\u308c\u3089\u306b\u9650\u5b9a\u3055\u308c\u307e\u305b\u3093\u3002
– Exchange Online\u3092\u901a\u3058\u305f\u30e1\u30fc\u30eb\u306e\u9001\u53d7\u4fe1\u3001Microsoft Viva Engage\u304b\u3089\u306e\u901a\u77e5\u30e1\u30fc\u30eb\u3082\u542b\u307e\u308c\u307e\u3059\u3002
– \u30e1\u30c3\u30bb\u30fc\u30b8\u30c8\u30ec\u30fc\u30b9\u306e\u53ce\u96c6\u304c\u9045\u5ef6\u307e\u305f\u306f\u5931\u6557\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002
– SharePoint Online\u304a\u3088\u3073\/\u307e\u305f\u306fMicrosoft OneDrive\u30e1\u30fc\u30eb\u5185\u306e\u691c\u7d22\u304c\u9045\u5ef6\u3057\u305f\u308a\u5b8c\u4e86\u3057\u306a\u3044\u3053\u3068\u304c\u3042\u308a\u307e\u3059\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<\/p>\n

\u73fe\u72b6:\u5f71\u97ff\u3092\u53d7\u3051\u305f\u30a4\u30f3\u30d5\u30e9\u3092\u5065\u5eb7\u72b6\u614b\u306b\u56de\u5fa9\u3057\u3001\u30b5\u30fc\u30d3\u30b9\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u306e\u30d0\u30e9\u30f3\u30b9\u3092\u6574\u3048\u3066\u56de\u5fa9\u3092\u9054\u6210\u3059\u308b\u305f\u3081\u306b\u5fc5\u8981\u306a\u63aa\u7f6e\u3092\u5f15\u304d\u7d9a\u304d\u691c\u8a0e\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n

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\u6b21\u56de\u66f4\u65b0:2026\u5e741\u670822\u65e5\u6728\u66dc\u65e5 23:00 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-14630","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/14630","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=14630"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/14630\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=14630"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=14630"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=14630"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}