{"id":13560,"date":"2025-10-31T13:01:10","date_gmt":"2025-10-31T04:01:10","guid":{"rendered":"https:\/\/m365jp.net\/?p=13560"},"modified":"2025-10-31T13:06:09","modified_gmt":"2025-10-31T04:06:09","slug":"servicerestored-op1162778-microsoft-365-apps-powerpoint-users-are-unable-to-open-double-key-encryption-dke-files-on-mobile-devices","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2025-10-31-servicerestored-op1162778-microsoft-365-apps-powerpoint-users-are-unable-to-open-double-key-encryption-dke-files-on-mobile-devices","title":{"rendered":"[serviceRestored] OP1162778 | Microsoft 365 apps | PowerPoint users are unable to open double key encryption (DKE) files on mobile devices"},"content":{"rendered":"
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OP1162778 | Microsoft 365 apps | PowerPoint users are unable to open double key encryption (DKE) files on mobile devices<\/th>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n\n\n\n\n\n\n\n\n\n\n
Status<\/th>\nserviceRestored<\/td>\n<\/tr>\n
Classification<\/th>\nadvisory<\/td>\n<\/tr>\n
User Impact<\/th>\nPowerPoint users were unable to open DKE files on mobile devices<\/td>\n<\/tr>\n
Last Updated<\/th>\n10\/31\/2025 03:46:56<\/td>\n<\/tr>\n
Start Time<\/th>\n09\/30\/2025 16:42:16<\/td>\n<\/tr>\n
End Time<\/th>\n10\/31\/2025 03:46:36<\/td>\n<\/tr>\n
Latest Message<\/th>\nTitle: PowerPoint users are unable to open double key encryption (DKE) files on mobile devices<\/p>\n

User impact: PowerPoint users were unable to open DKE files on mobile devices<\/p>\n

More info: Additionally, users could not change DKE file sensitivity labels. This occured for users leveraging both iOS and Android devices. There was no impact on other platforms where PowerPoint was supported, such as PPT for Win32.<\/p>\n

Final status: We confirmed that the fix has saturated throughout the affected environment. After an extended period of monitoring, we’re confident that the issue is resolved. <\/p>\n

Scope of impact: Any user attempting to open DKE files or change DKE file sensitivity labels in PowerPoint on iOS and Android devices was affected.<\/p>\n

Start time: Thursday, September 18, 2025, at 12:00 AM UTC<\/p>\n

End time: Monday, October 27, 2025, at 12:00 PM UTC<\/p>\n

Root cause: A recently deployed change was preventing users from opening DKE files on mobile devices or changing DKE file sensitivity labels as expected.<\/p>\n

Next steps:
– We’re assessing our deployment procedures to prevent similar impact stemming from future changes. <\/p>\n

This is the final update for the event.<\/td>\n<\/tr>\n

Machine Translation<\/th>\n\u30bf\u30a4\u30c8\u30eb: PowerPoint \u30e6\u30fc\u30b6\u30fc\u306f\u30e2\u30d0\u30a4\u30eb \u30c7\u30d0\u30a4\u30b9\u3067\u4e8c\u91cd\u9375\u6697\u53f7\u5316 (DKE) \u30d5\u30a1\u30a4\u30eb\u3092\u958b\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093<\/p>\n

\u30e6\u30fc\u30b6\u30fc\u3078\u306e\u5f71\u97ff: PowerPoint \u30e6\u30fc\u30b6\u30fc\u304c\u30e2\u30d0\u30a4\u30eb \u30c7\u30d0\u30a4\u30b9\u3067 DKE \u30d5\u30a1\u30a4\u30eb\u3092\u958b\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093\u3067\u3057\u305f<\/p>\n

\u8a73\u7d30: \u3055\u3089\u306b\u3001\u30e6\u30fc\u30b6\u30fc\u306f DKE \u30d5\u30a1\u30a4\u30eb\u306e\u79d8\u5bc6\u5ea6\u30e9\u30d9\u30eb\u3092\u5909\u66f4\u3067\u304d\u307e\u305b\u3093\u3067\u3057\u305f\u3002\u3053\u308c\u306f\u3001iOS\u30c7\u30d0\u30a4\u30b9\u3068Android\u30c7\u30d0\u30a4\u30b9\u306e\u4e21\u65b9\u3092\u5229\u7528\u3059\u308b\u30e6\u30fc\u30b6\u30fc\u3067\u767a\u751f\u3057\u307e\u3057\u305f\u3002Win32 \u306e PPT \u306a\u3069\u3001PowerPoint \u304c\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u308b\u4ed6\u306e\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u306b\u306f\u5f71\u97ff\u306f\u3042\u308a\u307e\u305b\u3093\u3067\u3057\u305f\u3002<\/p>\n

\u6700\u7d42\u30b9\u30c6\u30fc\u30bf\u30b9: \u4fee\u6b63\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u5f71\u97ff\u3092\u53d7\u3051\u308b\u74b0\u5883\u5168\u4f53\u3067\u98fd\u548c\u72b6\u614b\u306b\u306a\u3063\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u307e\u3057\u305f\u3002\u9577\u671f\u9593\u306e\u76e3\u8996\u306e\u5f8c\u3001\u554f\u984c\u306f\u89e3\u6c7a\u3055\u308c\u305f\u3068\u78ba\u4fe1\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u5f71\u97ff\u306e\u7bc4\u56f2: iOS \u304a\u3088\u3073 Android \u30c7\u30d0\u30a4\u30b9\u306e PowerPoint \u3067 DKE \u30d5\u30a1\u30a4\u30eb\u3092\u958b\u3044\u305f\u308a\u3001DKE \u30d5\u30a1\u30a4\u30eb\u306e\u79d8\u5bc6\u5ea6\u30e9\u30d9\u30eb\u3092\u5909\u66f4\u3057\u3088\u3046\u3068\u3057\u305f\u30e6\u30fc\u30b6\u30fc\u304c\u5f71\u97ff\u3092\u53d7\u3051\u307e\u3057\u305f\u3002<\/p>\n

\u958b\u59cb\u6642\u9593: 18 \u5e74 2025 \u6708 12 \u65e5\u6728\u66dc\u65e5\u5348\u524d 00 \u6642 UTC<\/p>\n

\u7d42\u4e86\u6642\u523b: 2025 \u5e74 10 \u6708 27 \u65e5\u6708\u66dc\u65e5\u3001\u5348\u5f8c 12:00 UTC<\/p>\n

\u6839\u672c\u539f\u56e0: \u6700\u8fd1\u5c55\u958b\u3055\u308c\u305f\u5909\u66f4\u306b\u3088\u308a\u3001\u30e6\u30fc\u30b6\u30fc\u304c\u30e2\u30d0\u30a4\u30eb \u30c7\u30d0\u30a4\u30b9\u3067 DKE \u30d5\u30a1\u30a4\u30eb\u3092\u958b\u3044\u305f\u308a\u3001DKE \u30d5\u30a1\u30a4\u30eb\u306e\u79d8\u5bc6\u5ea6\u30e9\u30d9\u30eb\u3092\u671f\u5f85\u3069\u304a\u308a\u306b\u5909\u66f4\u3057\u305f\u308a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093\u3067\u3057\u305f\u3002<\/p>\n

\u6b21\u306e\u30b9\u30c6\u30c3\u30d7:
– \u5c06\u6765\u306e\u5909\u66f4\u304b\u3089\u751f\u3058\u308b\u540c\u69d8\u306e\u5f71\u97ff\u3092\u9632\u3050\u305f\u3081\u306b\u3001\u30c7\u30d7\u30ed\u30a4\u624b\u9806\u3092\u8a55\u4fa1\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u30a4\u30d9\u30f3\u30c8\u306e\u6700\u7d42\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3067\u3059\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

OP1162778 | Microsoft 365 apps | PowerPoint users are unable to open double key encryption (DKE) files on mobi […]<\/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-13560","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/13560","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=13560"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/13560\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=13560"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=13560"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=13560"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}