{"id":14170,"date":"2025-12-07T15:01:22","date_gmt":"2025-12-07T06:01:22","guid":{"rendered":"https:\/\/m365jp.net\/?p=14170"},"modified":"2025-12-07T15:02:22","modified_gmt":"2025-12-07T06:02:22","slug":"servicedegradation-ex1192586-exchange-online-some-users-may-be-unable-to-open-inbound-secure-multipurpose-internet-mail-extensions-s-mime-encrypted-email-messages-4","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2025-12-07-servicedegradation-ex1192586-exchange-online-some-users-may-be-unable-to-open-inbound-secure-multipurpose-internet-mail-extensions-s-mime-encrypted-email-messages-4","title":{"rendered":"[serviceDegradation] EX1192586 | Exchange Online | Some users may be unable to open inbound Secure\/Multipurpose Internet Mail Extensions (S\/MIME) encrypted email messages"},"content":{"rendered":"
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EX1192586 | Exchange Online | Some users may be unable to open inbound Secure\/Multipurpose Internet Mail Extensions (S\/MIME) encrypted email messages<\/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 intermittently be unable open some inbound S\/MIME encrypted email messages in Exchange Online.<\/td>\n<\/tr>\n
Last Updated<\/th>\n12\/07\/2025 05:08:35<\/td>\n<\/tr>\n
Start Time<\/th>\n11\/30\/2025 00:00:00<\/td>\n<\/tr>\n
End Time<\/th>\n<\/td>\n<\/tr>\n
Latest Message<\/th>\nTitle: Some users may be unable to open inbound Secure\/Multipurpose Internet Mail Extensions (S\/MIME) encrypted email messages<\/p>\n

User impact: Users may intermittently be unable open some inbound S\/MIME encrypted email messages in Exchange Online.<\/p>\n

More info: This issue strictly impacts users with the Dynamic Delivery policy enabled.<\/p>\n

We’ve temporarily disabled Dynamic Delivery “for S\/MIME messages” while we work to resolve this issue<\/p>\n

Additionally, some users see a “Safe Attachments Scan in Progress” message upon opening an encrypted inbound email message.<\/p>\n

Current status: Our previously mentioned fix is continuing to deploy across the affected environments and is taking longer than initially expected to complete. As the deployment progresses, many of the affected users should start to see recovery and be able to open previously impacted S\/MIME messages. Additionally, we\u2019re exploring options available for expediting this fix deployment so that we can swiftly resolve the issue.<\/p>\n

Scope of impact: Some users with Dynamic Delivery enabled attempting to open S\/MIME encrypted email messages may be impacted.<\/p>\n

Start time: Sunday, November 30, 2025, at 12:00 AM UTC<\/p>\n

Next update by: Sunday, December 7, 2025, at 10:00 PM UTC<\/td>\n<\/tr>\n

Machine Translation<\/th>\n\u30bf\u30a4\u30c8\u30eb:\u4e00\u90e8\u306e\u30e6\u30fc\u30b6\u30fc\u306f\u3001\u53d7\u4fe1\u3059\u308bSecure\/Multipurpose Internet Mail Extensions(S\/MIME)\u6697\u53f7\u5316\u30e1\u30fc\u30eb\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u958b\u3051\u3089\u308c\u306a\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059<\/p>\n

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\u8a73\u7d30:\u3053\u306e\u554f\u984c\u306f\u52d5\u7684\u914d\u9001\u30dd\u30ea\u30b7\u30fc\u304c\u6709\u52b9\u306b\u306a\u3063\u3066\u3044\u308b\u30e6\u30fc\u30b6\u30fc\u306b\u9650\u5b9a\u7684\u306b\u767a\u751f\u3057\u307e\u3059\u3002<\/p>\n

\u3053\u306e\u554f\u984c\u306e\u89e3\u6c7a\u4f5c\u696d\u306e\u9593\u3001\u300cS\/MIME\u30e1\u30c3\u30bb\u30fc\u30b8\u300d\u306b\u5bfe\u3057\u3066\u4e00\u6642\u7684\u306b\u52d5\u7684\u914d\u4fe1\u3092\u7121\u52b9\u306b\u3057\u3066\u3044\u307e\u3059<\/p>\n

\u3055\u3089\u306b\u3001\u4e00\u90e8\u306e\u30e6\u30fc\u30b6\u30fc\u306f\u6697\u53f7\u5316\u3055\u308c\u305f\u53d7\u4fe1\u30e1\u30fc\u30eb\u3092\u958b\u304f\u3068\u300cSafe Attachments Scan in Progress\u300d\u3068\u3044\u3046\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n

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\u958b\u59cb\u6642\u9593:2025\u5e7411\u670830\u65e5(\u65e5)0:00 UTC<\/p>\n

\u6b21\u56de\u66f4\u65b0:2025\u5e7412\u67087\u65e5(\u65e5)\u5348\u5f8c10\u6642(UTC)<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

EX1192586 | Exchange Online | Some users may be unable to open inbound Secure\/Multipurpose Internet Mail Exten […]<\/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-14170","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/14170","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=14170"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/14170\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=14170"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=14170"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=14170"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}