{"id":14629,"date":"2026-01-23T05:01:05","date_gmt":"2026-01-22T20:01:05","guid":{"rendered":"https:\/\/m365jp.net\/?p=14629"},"modified":"2026-01-23T05:06:06","modified_gmt":"2026-01-22T20:06:06","slug":"investigating-mo1221364-microsoft-365-suite-users-may-be-seeing-degraded-service-functionality-across-multiple-microsoft-365-services","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-01-23-investigating-mo1221364-microsoft-365-suite-users-may-be-seeing-degraded-service-functionality-across-multiple-microsoft-365-services","title":{"rendered":"[investigating] MO1221364 | Microsoft 365 suite | Users may be seeing degraded service functionality across multiple Microsoft 365 services"},"content":{"rendered":"
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MO1221364 | Microsoft 365 suite | Users may be seeing degraded service functionality across 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>\ninvestigating<\/td>\n<\/tr>\n
Classification<\/th>\nincident<\/td>\n<\/tr>\n
User Impact<\/th>\nUsers may be seeing degraded service functionality across multiple Microsoft 365 services.<\/td>\n<\/tr>\n
Last Updated<\/th>\n01\/22\/2026 19:57:58<\/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 across multiple Microsoft 365 services<\/p>\n

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

More info: Users may be receiving a “451 4.3.2 temporary server issue” error message when attempting to access the service portals or use 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 email from Microsoft Viva Engage.
– Accessing the service portals, including Microsoft Purview and Microsoft Defender XDR.<\/p>\n

Current status: We’re reviewing the reported impact scenarios and identifying what portion of the dependent service infrastructure is degraded so we can determine our next troubleshooting steps.<\/p>\n

Scope of impact: The scope of this issue is currently being investigated.<\/p>\n

Next update by: Thursday, January 22, 2026, at 9:00 PM UTC<\/td>\n<\/tr>\n

Machine Translation<\/th>\n\u30bf\u30a4\u30c8\u30eb:\u30e6\u30fc\u30b6\u30fc\u306f\u8907\u6570\u306eMicrosoft 365\u30b5\u30fc\u30d3\u30b9\u3067\u30b5\u30fc\u30d3\u30b9\u306e\u6a5f\u80fd\u4f4e\u4e0b\u3092\u76ee\u306b\u3059\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093<\/p>\n

\u30e6\u30fc\u30b6\u30fc\u3078\u306e\u5f71\u97ff:\u30e6\u30fc\u30b6\u30fc\u306f\u8907\u6570\u306eMicrosoft 365\u30b5\u30fc\u30d3\u30b9\u3067\u30b5\u30fc\u30d3\u30b9\u306e\u6a5f\u80fd\u4f4e\u4e0b\u3092\u76ee\u306b\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u8a73\u7d30\u60c5\u5831:\u30b5\u30fc\u30d3\u30b9\u30dd\u30fc\u30bf\u30eb\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3088\u3046\u3068\u3057\u305f\u308aOutlook\u3092\u5229\u7528\u3057\u3088\u3046\u3068\u3057\u305f\u969b\u306b\u3001\u300c451 4.3.2 \u4e00\u6642\u30b5\u30fc\u30d0\u30fc\u306e\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(Microsoft Viva Engage\u304b\u3089\u306e\u901a\u77e5\u30e1\u30fc\u30eb\u3092\u542b\u3080)
– Microsoft Purview\u3084Microsoft Defender XDR\u3092\u542b\u3080\u30b5\u30fc\u30d3\u30b9\u30dd\u30fc\u30bf\u30eb\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3002<\/p>\n

\u73fe\u72b6:\u5831\u544a\u3055\u308c\u305f\u5f71\u97ff\u30b7\u30ca\u30ea\u30aa\u3092\u78ba\u8a8d\u3057\u3001\u4f9d\u5b58\u30b5\u30fc\u30d3\u30b9\u30a4\u30f3\u30d5\u30e9\u306e\u3069\u306e\u90e8\u5206\u304c\u52a3\u5316\u3057\u3066\u3044\u308b\u304b\u3092\u7279\u5b9a\u3057\u3001\u6b21\u306e\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306e\u30b9\u30c6\u30c3\u30d7\u3092\u6c7a\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u5f71\u97ff\u7bc4\u56f2:\u3053\u306e\u554f\u984c\u306e\u7bc4\u56f2\u306f\u73fe\u5728\u8abf\u67fb\u4e2d\u3067\u3059\u3002<\/p>\n

\u6b21\u56de\u66f4\u65b0:2026\u5e741\u670822\u65e5\u6728\u66dc\u65e5 \u5348\u5f8c9\u6642 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 across multiple Microsoft […]<\/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-14629","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/14629","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=14629"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/14629\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=14629"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=14629"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=14629"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}