{"id":15499,"date":"2026-03-21T00:00:57","date_gmt":"2026-03-20T15:00:57","guid":{"rendered":"https:\/\/m365jp.net\/?p=15499"},"modified":"2026-03-21T00:01:10","modified_gmt":"2026-03-20T15:01:10","slug":"servicedegradation-ex1256744-exchange-online-some-users-experience-errors-when-attempting-to-create-shared-mailboxes-in-exchange-online","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-03-21-servicedegradation-ex1256744-exchange-online-some-users-experience-errors-when-attempting-to-create-shared-mailboxes-in-exchange-online","title":{"rendered":"[serviceDegradation] EX1256744 | Exchange Online | Some users experience errors when attempting to create shared mailboxes in Exchange Online"},"content":{"rendered":"<div class=\"postie-post\">\n<div>\n<hr>\n<table id=\"section\">\n<tbody>\n<tr>\n<th width=\"95%\">EX1256744 | Exchange Online | Some users experience errors when attempting to create shared mailboxes in Exchange Online<\/th>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr>\n<table id=\"data\">\n<tbody>\n<tr>\n<th>Status<\/th>\n<td class=\"bad\">serviceDegradation<\/td>\n<\/tr>\n<tr>\n<th>Classification<\/th>\n<td>advisory<\/td>\n<\/tr>\n<tr>\n<th>User Impact<\/th>\n<td>Users experience errors when attempting to create shared mailboxes in Exchange Online.<\/td>\n<\/tr>\n<tr>\n<th>Last Updated<\/th>\n<td>03\/20\/2026 14:57:28<\/td>\n<\/tr>\n<tr>\n<th>Start Time<\/th>\n<td>03\/20\/2026 11:20:36<\/td>\n<\/tr>\n<tr>\n<th>End Time<\/th>\n<td><\/td>\n<\/tr>\n<tr>\n<th>Latest Message<\/th>\n<td>Title: Some users experience errors when attempting to create shared mailboxes in Exchange Online<\/p>\n<p>  User impact: Users experience errors when attempting to create shared mailboxes in Exchange Online.<\/p>\n<p>  Current status: We&#8217;re analyzing HTTP Archive format (HAR) logs to identify the underlying root cause and a mitigation plan.<\/p>\n<p>  Scope of impact: Your organization is affected by this event, and some users attempting to create shared mailboxes in Exchange Online may be impacted.<\/p>\n<p>  Next update by: Friday, March 20, 2025, at 5:30 PM UTC<\/td>\n<\/tr>\n<tr>\n<th>Machine Translation<\/th>\n<td>\u30bf\u30a4\u30c8\u30eb:\u4e00\u90e8\u306e\u30e6\u30fc\u30b6\u30fc\u306fExchange Online\u3067\u5171\u6709\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u3092\u4f5c\u6210\u3057\u3088\u3046\u3068\u3057\u305f\u969b\u306b\u30a8\u30e9\u30fc\u3092\u7d4c\u9a13\u3057\u307e\u3059<\/p>\n<p>  \u30e6\u30fc\u30b6\u30fc\u3078\u306e\u5f71\u97ff:Exchange Online\u3067\u5171\u6709\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u3092\u4f5c\u6210\u3057\u3088\u3046\u3068\u3057\u305f\u969b\u306b\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>  \u73fe\u72b6:HTTP\u30a2\u30fc\u30ab\u30a4\u30d6\u5f62\u5f0f(HAR)\u30ed\u30b0\u3092\u5206\u6790\u3057\u3001\u6839\u672c\u539f\u56e0\u3068\u7de9\u548c\u7b56\u3092\u7279\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>  \u5f71\u97ff\u7bc4\u56f2:\u3053\u306e\u30a4\u30d9\u30f3\u30c8\u306f\u8cb4\u7d44\u7e54\u306b\u5f71\u97ff\u3092\u53ca\u307c\u3057\u3066\u304a\u308a\u3001Exchange Online\u3067\u5171\u6709\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u3092\u4f5c\u6210\u3057\u3088\u3046\u3068\u3059\u308b\u4e00\u90e8\u306e\u30e6\u30fc\u30b6\u30fc\u304c\u5f71\u97ff\u3092\u53d7\u3051\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>  \u6b21\u56de\u66f4\u65b0:2025\u5e743\u670820\u65e5\u91d1\u66dc\u65e5 \u5348\u5f8c5\u664230\u5206 UTC<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>EX1256744 | Exchange Online | Some users experience errors when attempting to create shared mailboxes in Excha 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