{"id":16721,"date":"2026-06-06T07:01:53","date_gmt":"2026-06-05T22:01:53","guid":{"rendered":"https:\/\/m365jp.net\/?p=16721"},"modified":"2026-06-06T07:06:20","modified_gmt":"2026-06-05T22:06:20","slug":"mc1125491-updated-microsoft-outlook-for-windows-add-attachments-while-offline-5","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-06-06-mc1125491-updated-microsoft-outlook-for-windows-add-attachments-while-offline-5","title":{"rendered":"MC1125491 | (Updated) Microsoft Outlook for Windows: Add attachments while offline"},"content":{"rendered":"<div class=\"postie-post\">\n<div>\n<hr>\n<table id=\"section\">\n<tbody>\n<tr>\n<th width=\"95%\">MC1125491 | (Updated) Microsoft Outlook for Windows: Add attachments while offline<\/th>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr>\n<table id=\"data\">\n<tbody>\n<tr>\n<th>Classification<\/th>\n<td>stayInformed<\/td>\n<\/tr>\n<tr>\n<th>Last Updated<\/th>\n<td>06\/05\/2026 21:41:55<\/td>\n<\/tr>\n<tr>\n<th>Start Time<\/th>\n<td>07\/30\/2025 23:48:11<\/td>\n<\/tr>\n<tr>\n<th>End Time<\/th>\n<td>07\/31\/2026 08:00:00<\/td>\n<\/tr>\n<tr>\n<th>Message Content<\/th>\n<td>\n<p>Updated June 5, 2026: We have updated the timeline. Thank you for your patience.&nbsp;<\/p>\n<p><b>Introduction<\/b><\/p>\n<p>We\u2019re enhancing offline functionality in the new Microsoft Outlook for Windows. This update (Microsoft 365 Roadmap ID  <a href=\"https:\/\/www.microsoft.com\/en-us\/microsoft-365\/roadmap?filters=&amp;searchterms=496371\" target=\"_blank\">  496371<\/a>) enables users to add file attachments while composing emails offline, improving productivity for those working without an internet connection.  <\/p>\n<p><b>When this will happen<br \/>  <\/b><\/p>\n<ul>\n<li>Targeted Release (Worldwide): Rollout begins in late October 2025 and is expected to complete by late March 2026 (previously late November 2025).  <\/li>\n<li>General Availability (Worldwide): This is now currently available.<\/li>\n<li>General Availability (GCC): Rollout begins in early June 2026 (previously early May) and is expected to complete by end of June 2026 (previously late May).<\/li>\n<\/ul>\n<p><b>How this affects your organization<br \/>  <\/b><\/p>\n<p>Users with offline mode enabled in the new Outlook for Windows will be able to attach files to draft emails while offline. These emails, including attachments, will be sent automatically once the device reconnects to the internet.  <\/p>\n<p>This feature will be on or off by default based on your current configuration of the  <code>OWAMailboxPolicy-OfflineEnabledWin<\/code> policy. No changes will be made to existing configurations.  <\/p>\n<p><b>What you can do to prepare<br \/>  <\/b><\/p>\n<p>To enable this functionality, ensure the following settings are configured in the new Outlook under  <i>Settings <\/i>&gt; <i>General <\/i>&gt; <i>Offline<\/i>:  <\/p>\n<ul>\n<li>Enable offline email, calendar, and people  <\/li>\n<li>Include file attachments<\/li>\n<\/ul>\n<p>Admins can manage this feature using the <code>OWAMailboxPolicy-OfflineEnabledWin<\/code> mailbox policy. Learn more at&nbsp;<a href=\"https:\/\/learn.microsoft.com\/powershell\/module\/exchange\/set-owamailboxpolicy\" target=\"_blank\">Set-OwaMailboxPolicy<\/a>.<\/p>\n<p><i>Caption i. Offline editing can be enabled or disabled in Settings &gt; General &gt; Offline<\/i><\/p>\n<p><img decoding=\"async\" style=\"width: 400px\" alt=\"Screenshot highlighting toggle to Enable offline email, calendar, and people.\" src=\"https:\/\/cxcs.microsoft.net\/static\/public\/messagecenter\/neutral\/5512c4e3-99b6-44f5-b266-6f994f939ded\/5c49e703b9acbba35362a284dab2a3567e666d9a.png\"><\/p>\n<p><b>Compliance considerations<br \/>  <\/b><\/p>\n<p>No compliance considerations identified, review as appropriate for your organization.<\/p>\n<\/td>\n<\/tr>\n<tr>\n<th>Machine Translation<\/th>\n<td>\n<p>2026\u5e746\u67085\u65e5\u66f4\u65b0:\u30bf\u30a4\u30e0\u30e9\u30a4\u30f3\u3092\u66f4\u65b0\u3057\u307e\u3057\u305f\u3002\u3054\u8f9b\u62b1\u3044\u305f\u3060\u304d\u3042\u308a\u304c\u3068\u3046\u3054\u3056\u3044\u307e\u3059\u3002&nbsp;<\/p>\n<p><b>\u306f\u3058\u3081\u306b<\/b><\/p>\n<p>\u65b0\u3057\u3044Microsoft Outlook for Windows\u306e\u30aa\u30d5\u30e9\u30a4\u30f3\u6a5f\u80fd\u3092\u5f37\u5316\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8(Microsoft 365 Roadmap ID  <a href=\"https:\/\/www.microsoft.com\/en-us\/microsoft-365\/roadmap?filters=&amp;searchterms=496371\" target=\"_blank\">  496371<\/a>)\u306b\u3088\u308a\u3001\u30aa\u30d5\u30e9\u30a4\u30f3\u3067\u30e1\u30fc\u30eb\u3092\u66f8\u3044\u3066\u3044\u308b\u9593\u306b\u30d5\u30a1\u30a4\u30eb\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u3092\u8ffd\u52a0\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u63a5\u7d9a\u306a\u3057\u3067\u4f5c\u696d\u3059\u308b\u4eba\u306e\u751f\u7523\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>\n<p><b>\u305d\u308c\u304c\u3044\u3064\u8d77\u3053\u308b\u306e\u304b<\/b><\/p>\n<ul>\n<li>\u30bf\u30fc\u30b2\u30c3\u30c8\u30ea\u30ea\u30fc\u30b9(\u4e16\u754c\u5411\u3051):\u5c55\u958b\u306f2025\u5e7410\u6708\u4e0b\u65ec\u306b\u59cb\u307e\u308a\u30012026\u5e743\u6708\u4e0b\u65ec(\u4ee5\u524d\u306f2025\u5e7411\u6708\u4e0b\u65ec)\u307e\u3067\u306b\u5b8c\u4e86\u3059\u308b\u4e88\u5b9a\u3067\u3059\u3002<\/li>\n<li>\u4e00\u822c\u516c\u958b(\u4e16\u754c\u4e2d):\u73fe\u5728\u3001\u5229\u7528\u53ef\u80fd\u3067\u3059\u3002<\/li>\n<li>\u4e00\u822c\u7a3c\u50cd(GCC):\u5c55\u958b\u306f2026\u5e746\u6708\u521d\u65ec(\u4ee5\u524d\u306f5\u6708\u521d\u65ec)\u306b\u958b\u59cb\u3055\u308c\u30012026\u5e746\u6708\u672b(\u4ee5\u524d\u306f5\u6708\u4e0b\u65ec)\u307e\u3067\u306b\u5b8c\u4e86\u3059\u308b\u4e88\u5b9a\u3067\u3059\u3002<\/li>\n<\/ul>\n<p><b>\u3053\u308c\u304c\u3042\u306a\u305f\u306e\u7d44\u7e54\u306b\u4e0e\u3048\u308b\u5f71\u97ff<\/b><\/p>\n<p>\u65b0\u3057\u3044Outlook for Windows\u3067\u30aa\u30d5\u30e9\u30a4\u30f3\u30e2\u30fc\u30c9\u3092\u6709\u52b9\u306b\u3057\u305f\u30e6\u30fc\u30b6\u30fc\u306f\u3001\u30aa\u30d5\u30e9\u30a4\u30f3\u3067\u3082\u4e0b\u66f8\u304d\u30e1\u30fc\u30eb\u306b\u30d5\u30a1\u30a4\u30eb\u3092\u6dfb\u4ed8\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u30e1\u30fc\u30eb\u306f\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u3082\u542b\u3081\u3066\u3001\u30c7\u30d0\u30a4\u30b9\u304c\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306b\u518d\u63a5\u7d9a\u3055\u308c\u308b\u3068\u81ea\u52d5\u7684\u306b\u9001\u4fe1\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u6a5f\u80fd\u306f\u3001\u73fe\u5728\u306e <code>OWAMailboxPolicy-OfflineEnabledWin<\/code> \u30dd\u30ea\u30b7\u30fc\u306e\u8a2d\u5b9a\u306b\u3088\u3063\u3066\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u30aa\u30f3\u307e\u305f\u306f\u30aa\u30d5\u3068\u306a\u308a\u307e\u3059\u3002\u65e2\u5b58\u306e\u69cb\u6210\u306b\u5909\u66f4\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p><b>\u6e96\u5099\u306e\u305f\u3081\u306b\u3067\u304d\u308b\u3053\u3068<\/b><\/p>\n<p>\u3053\u306e\u6a5f\u80fd\u3092\u6709\u52b9\u306b\u3059\u308b\u306b\u306f\u3001\u65b0\u3057\u3044Outlook\u306e <i>\u300c\u8a2d\u5b9a <\/i>\u300d&gt; <i>\u300c\u4e00\u822c <\/i>&gt; <i>\u30aa\u30d5\u30e9\u30a4\u30f3<\/i>\u300d\u3067\u4ee5\u4e0b\u306e\u8a2d\u5b9a\u3092\u8a2d\u5b9a\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<ul>\n<li>\u30aa\u30d5\u30e9\u30a4\u30f3\u306e\u30e1\u30fc\u30eb\u3001\u30ab\u30ec\u30f3\u30c0\u30fc\u3001\u305d\u3057\u3066\u4eba\u3092\u6709\u52b9\u306b\u3057\u3066\u304f\u3060\u3055\u3044<\/li>\n<li>\u30d5\u30a1\u30a4\u30eb\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u3092\u542b\u3081\u308b<\/li>\n<\/ul>\n<p>\u7ba1\u7406\u8005\u306f <code>OWAMailboxPolicy-OfflineEnabledWin<\/code> \u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u30dd\u30ea\u30b7\u30fc\u3092\u4f7f\u3063\u3066\u3053\u306e\u6a5f\u80fd\u3092\u7ba1\u7406\u3067\u304d\u307e\u3059\u3002\u8a73\u7d30\u306f<a href=\"https:\/\/learn.microsoft.com\/powershell\/module\/exchange\/set-owamailboxpolicy\" target=\"_blank\">Set-OwaMailboxPolicy<\/a>\u3092\u3054\u89a7\u304f\u3060\u3055\u3044&nbsp;\u3002<\/p>\n<p><i>\u30ad\u30e3\u30d7\u30b7\u30e7\u30f3i\u3002\u30aa\u30d5\u30e9\u30a4\u30f3\u7de8\u96c6\u306f\u8a2d\u5b9a&gt;\u300c\u4e00\u822c&gt;\u30aa\u30d5\u30e9\u30a4\u30f3\u300d\u3067\u6709\u52b9\u307e\u305f\u306f\u7121\u52b9\u306b\u3067\u304d\u307e\u3059<\/i><\/p>\n<p><img decoding=\"async\" style=\"width: 400px\" alt=\"Screenshot highlighting toggle to Enable offline email, calendar, and people.\" src=\"https:\/\/cxcs.microsoft.net\/static\/public\/messagecenter\/neutral\/5512c4e3-99b6-44f5-b266-6f994f939ded\/5c49e703b9acbba35362a284dab2a3567e666d9a.png\"><\/p>\n<p><b>\u30b3\u30f3\u30d7\u30e9\u30a4\u30a2\u30f3\u30b9\u306e\u8003\u616e\u4e8b\u9805<\/b><\/p>\n<p>\u30b3\u30f3\u30d7\u30e9\u30a4\u30a2\u30f3\u30b9\u4e0a\u306e\u61f8\u5ff5\u4e8b\u9805\u306f\u7279\u5b9a\u3055\u308c\u305a\u3001\u7d44\u7e54\u306b\u5fdc\u3058\u3066\u30ec\u30d3\u30e5\u30fc\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>MC1125491 | (Updated) Microsoft Outlook for Windows: Add attachments while offline Classification stayInformed [&hellip;]<\/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-16721","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/16721","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=16721"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/16721\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=16721"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=16721"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=16721"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}