{"id":16314,"date":"2026-05-07T08:00:50","date_gmt":"2026-05-06T23:00:50","guid":{"rendered":"https:\/\/m365jp.net\/?p=16314"},"modified":"2026-05-07T08:01:09","modified_gmt":"2026-05-06T23:01:09","slug":"mc1302908-outlook-support-for-storing-s-mime-certificates-in-contacts-in-new-outlook","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-05-07-mc1302908-outlook-support-for-storing-s-mime-certificates-in-contacts-in-new-outlook","title":{"rendered":"MC1302908 | Outlook: Support for storing S\/MIME certificates in contacts in new Outlook"},"content":{"rendered":"<div class=\"postie-post\">\n<div>\n<hr>\n<table id=\"section\">\n<tbody>\n<tr>\n<th width=\"95%\">MC1302908 | Outlook: Support for storing S\/MIME certificates in contacts in new Outlook<\/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>05\/06\/2026 22:54:47<\/td>\n<\/tr>\n<tr>\n<th>Start Time<\/th>\n<td>05\/06\/2026 22:54:41<\/td>\n<\/tr>\n<tr>\n<th>End Time<\/th>\n<td>07\/21\/2026 07:00:00<\/td>\n<\/tr>\n<tr>\n<th>Message Content<\/th>\n<td>\n<p><b>[Introduction]<\/b><\/p>\n<p>  The<b> new Outlook for Windows <\/b>now allows users to store <b>S\/MIME <\/b>encryption certificates directly within Contacts. This capability enables users to save recipients\u2019 public certificates and use them to send S\/MIME encrypted emails, improving secure   communication and continuity when transitioning from <b>classic Outlook for Windows (Win32)<\/b>. Certificates previously stored in Contacts in classic Outlook will automatically be available in new Outlook.<\/p>\n<p>  This message is associated with Microsoft 365 Roadmap ID <a href=\"https:\/\/www.microsoft.com\/microsoft-365\/roadmap?filters=&amp;searchterms=518288\" target=\"_blank\">  518288<\/a>.<\/p>\n<p><b>[When this will happen:]<\/b><\/p>\n<p>  <\/p>\n<ul>  <\/p>\n<li>General Availability (Worldwide): We will begin rolling out in <b>mid-May 2026<\/b> and expect to complete by  <b>late May 2026<\/b>.  <\/li>\n<li>General Availability (GCC): We will begin rolling out in <b>early June 2026<\/b> and expect to complete by  <b>late June 2026<\/b>.<\/li>\n<p>  <\/ul>\n<p><b>[How this affects your organization:]<\/b><\/p>\n<p><b>Who is affected:<\/b><\/p>\n<p>  <\/p>\n<ul>  <\/p>\n<li>Users of <b>new Outlook for Windows<\/b><\/li>\n<p>  <\/p>\n<li>Organizations that use <b>S\/MIME encryption<\/b><\/li>\n<p>  <\/ul>\n<p><b>What will happen:<\/b><\/p>\n<p>  <\/p>\n<ul>  <\/p>\n<li>Users can store recipients\u2019 S\/MIME public certificates directly in Contacts.<\/li>\n<p>Screenshot: <i>To add a S\/MIME certificate, go to <b>Your contacts<\/b> &gt; <b>Certificates  <\/b>&gt; <b>Add certificate<\/b>:<\/i><\/p>\n<p><img decoding=\"async\" style=\"width: 400px\" alt=\"Add certificate option in contacts.\" src=\"https:\/\/cxcs.microsoft.net\/file\/ccp\/en-us\/5f20f0ad-0dbc-4652-8558-c3e21b7ae72b\"><\/p>\n<p>  <\/p>\n<li>Stored certificates can be used to encrypt outgoing email to those recipients.<\/li>\n<p>  <\/p>\n<li>Certificates saved in Contacts in classic Outlook (Win32) will automatically carry over.<\/li>\n<p>  <\/p>\n<li>Feature is <b>available by default<\/b>; no admin configuration required.<\/li>\n<p>  <\/p>\n<li>No impact to users who are not using new Outlook for Windows.<\/li>\n<p>  <\/ul>\n<p><b>[What you can do to prepare:]<\/b><\/p>\n<p>  <\/p>\n<ul>  <\/p>\n<li>No admin action is required to enable this feature.<\/li>\n<p>  <\/p>\n<li>If your organization uses S\/MIME:<br \/> \n<ul>  <\/p>\n<li>Instruct users to add or import S\/MIME public certificates into Contacts.<\/li>\n<p>  <\/p>\n<li>Communicate how to select S\/MIME encryption when composing emails. Learn more:  <a href=\"https:\/\/support.microsoft.com\/office\/send-s-mime-or-microsoft-purview-encrypted-emails-in-outlook-373339cb-bf1a-4509-b296-802a39d801dc\" target=\"_blank\">  Send S\/MIME or Microsoft Purview encrypted emails in Outlook | Microsoft Support<\/a>.<\/li>\n<p>  <\/ul>\n<p>  <\/li>\n<p>  <\/p>\n<li>Update internal documentation for users transitioning from classic Outlook.<\/li>\n<p>  <\/p>\n<li>Inform helpdesk teams of this improved certificate handling experience.<\/li>\n<p>  <\/ul>\n<p><b>[Compliance considerations:]<\/b><\/p>\n<table class=\"table table-bordered\">\n<tbody>\n<tr>\n<td><b>Area<\/b><\/td>\n<td><b>Explanation<\/b><\/td>\n<\/tr>\n<tr>\n<td>Does the change store new customer data?<\/td>\n<td>Classic Outlook already has this capability, and we are bringing it to new Outlook as well. S\/MIME public certificates can now be stored in Outlook Contacts; these persist as part of contact data.<\/td>\n<\/tr>\n<tr>\n<td>Does the change alter how existing customer data is processed, stored, or accessed?<\/td>\n<td>Existing certificates stored in classic Outlook Contacts are now accessible in new Outlook, improving continuity.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/td>\n<\/tr>\n<tr>\n<th>Machine Translation<\/th>\n<td>\n<p><b>[\u306f\u3058\u3081\u306b]<\/b><\/p>\n<p><b>\u65b0\u3057\u3044Outlook\u7248<\/b>Windows\u3067\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u304cS<b>\/MIME<\/b>\u6697\u53f7\u5316\u8a3c\u660e\u66f8\u3092\u76f4\u63a5\u9023\u7d61\u5148\u5185\u306b\u4fdd\u5b58\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u3053\u306e\u6a5f\u80fd\u306b\u3088\u308a\u3001\u30e6\u30fc\u30b6\u30fc\u306f\u53d7\u4fe1\u8005\u306e\u516c\u958b\u8a3c\u660e\u66f8\u3092\u4fdd\u5b58\u3057\u3001\u305d\u308c\u3092\u4f7f\u3063\u3066S\/MIME\u6697\u53f7\u5316\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3067\u304d\u3001<b>\u5f93\u6765\u306eOutlook(Win32)<\/b>\u304b\u3089\u306e\u79fb\u884c\u6642\u306e\u5b89\u5168\u306a\u901a\u4fe1\u3068\u7d99\u7d9a\u6027\u3092\u5411\u4e0a\u3055\u305b\u307e\u3059\u3002\u5f93\u6765\u306eOutlook\u306e\u9023\u7d61\u5148\u306b\u4fdd\u5b58\u3055\u308c\u3066\u3044\u305f\u8a3c\u660e\u66f8\u306f\u3001\u65b0\u3057\u3044Outlook\u3067\u81ea\u52d5\u7684\u306b\u5229\u7528\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u306fMicrosoft 365 Roadmap ID <a href=\"https:\/\/www.microsoft.com\/microsoft-365\/roadmap?filters=&amp;searchterms=518288\" target=\"_blank\">  518288<\/a>\u306b\u95a2\u9023\u4ed8\u3051\u3089\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p><b>[\u3044\u3064\u8d77\u3053\u308b\u304b:]<\/b><\/p>\n<p>  <\/p>\n<ul>  <\/p>\n<li>\u4e00\u822c\u516c\u958b(\u4e16\u754c): <b>2026\u5e745\u6708\u4e2d\u65ec<\/b> \u304b\u3089\u5c55\u958b\u3092\u958b\u59cb\u3057\u3001 <b>5\u6708\u4e0b\u65ec<\/b>\u307e\u3067\u306b\u5b8c\u4e86\u3059\u308b\u4e88\u5b9a\u3067\u3059\u3002<\/li>\n<li>\u4e00\u822c\u7a3c\u50cd\u958b\u59cb(GCC): <b>2026\u5e746\u6708\u521d<\/b> \u65ec\u306b\u5c55\u958b\u3092\u958b\u59cb\u3057\u3001 <b>2026\u5e746\u6708\u4e0b\u65ec<\/b>\u307e\u3067\u306b\u5b8c\u4e86\u3059\u308b\u4e88\u5b9a\u3067\u3059\u3002<\/li>\n<p>  <\/ul>\n<p><b>[\u3053\u308c\u304c\u3042\u306a\u305f\u306e\u7d44\u7e54\u306b\u3069\u306e\u3088\u3046\u306a\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u304b:]<\/b><\/p>\n<p><b>\u5f71\u97ff\u3092\u53d7\u3051\u308b\u4eba\u7269:<\/b><\/p>\n<p>  <\/p>\n<ul>  <\/p>\n<li><b>\u65b0\u3057\u3044Outlook\u306e<\/b>\u30e6\u30fc\u30b6\u30fc<\/li>\n<p>  <\/p>\n<li><b>S\/MIME\u6697\u53f7\u5316<\/b>\u3092\u4f7f\u7528\u3059\u308b\u7d44\u7e54<\/li>\n<p>  <\/ul>\n<p><b>\u4eca\u5f8c\u306e\u5c55\u958b:<\/b><\/p>\n<p>  <\/p>\n<ul>  <\/p>\n<li>\u30e6\u30fc\u30b6\u30fc\u306f\u53d7\u4fe1\u8005\u306eS\/MIME\u30d1\u30d6\u30ea\u30c3\u30af\u8a3c\u660e\u66f8\u3092\u76f4\u63a5\u9023\u7d61\u5148\u306b\u4fdd\u5b58\u3067\u304d\u307e\u3059\u3002<\/li>\n<p>\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8:<i>S\/MIME\u8a3c\u660e\u66f8\u3092\u8ffd\u52a0\u3059\u308b\u306b\u306f\u3001\u9023\u7d61\u5148&gt;<b>\u8a3c\u660e\u66f8<\/b>&gt;<b>\u8a3c\u660e\u66f8\u3092\u8ffd\u52a0<\/b>\u3057\u3066\u304f\u3060\u3055\u3044:<b><\/b><\/i><\/p>\n<p><img decoding=\"async\" style=\"width: 400px\" alt=\"Add certificate option in contacts.\" src=\"https:\/\/cxcs.microsoft.net\/file\/ccp\/en-us\/5f20f0ad-0dbc-4652-8558-c3e21b7ae72b\"><\/p>\n<p>  <\/p>\n<li>\u4fdd\u5b58\u3055\u308c\u305f\u8a3c\u660e\u66f8\u306f\u3001\u53d7\u4fe1\u8005\u3078\u306e\u9001\u4fe1\u30e1\u30fc\u30eb\u3092\u6697\u53f7\u5316\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002<\/li>\n<p>  <\/p>\n<li>\u30af\u30e9\u30b7\u30c3\u30afOutlook(Win32)\u306e\u9023\u7d61\u5148\u306b\u4fdd\u5b58\u3055\u308c\u305f\u8a3c\u660e\u66f8\u306f\u81ea\u52d5\u7684\u306b\u5f15\u304d\u7d99\u304c\u308c\u307e\u3059\u3002<\/li>\n<p>  <\/p>\n<li>\u3053\u306e\u6a5f\u80fd\u306f <b>\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u5229\u7528\u53ef\u80fd\u3067\u3059<\/b>\u3002\u7ba1\u7406\u8005\u8a2d\u5b9a\u306f\u4e0d\u8981\u3067\u3059\u3002<\/li>\n<p>  <\/p>\n<li>\u65b0\u3057\u3044Outlook\u3092Windows\u3067\u4f7f\u3063\u3066\u3044\u306a\u3044\u30e6\u30fc\u30b6\u30fc\u306b\u306f\u5f71\u97ff\u304c\u3042\u308a\u307e\u305b\u3093\u3002<\/li>\n<p>  <\/ul>\n<p><b>[\u6e96\u5099\u306e\u305f\u3081\u306b\u3067\u304d\u308b\u3053\u3068:]<\/b><\/p>\n<p>  <\/p>\n<ul>  <\/p>\n<li>\u3053\u306e\u6a5f\u80fd\u3092\u6709\u52b9\u306b\u3059\u308b\u305f\u3081\u306b\u7ba1\u7406\u8005\u306e\u64cd\u4f5c\u306f\u5fc5\u8981\u3042\u308a\u307e\u305b\u3093\u3002<\/li>\n<p>  <\/p>\n<li>\u5fa1\u793e\u304cS\/MIME\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u5834\u5408:\n<ul>  <\/p>\n<li>\u30e6\u30fc\u30b6\u30fc\u306bS\/MIME\u306e\u516c\u958b\u8a3c\u660e\u66f8\u3092Contacts\u306b\u8ffd\u52a0\u307e\u305f\u306f\u30a4\u30f3\u30dd\u30fc\u30c8\u3059\u308b\u3088\u3046\u6307\u793a\u3057\u307e\u3059\u3002<\/li>\n<p>  <\/p>\n<li>\u30e1\u30fc\u30eb\u4f5c\u6210\u6642\u306bS\/MIME\u6697\u53f7\u5316\u3092\u9078\u629e\u3059\u308b\u65b9\u6cd5\u3092\u4f1d\u3048\u307e\u3057\u3087\u3046\u3002\u8a73\u3057\u304f\u306f\u3053\u3061\u3089: <a href=\"https:\/\/support.microsoft.com\/office\/send-s-mime-or-microsoft-purview-encrypted-emails-in-outlook-373339cb-bf1a-4509-b296-802a39d801dc\" target=\"_blank\">  Outlook\u3067S\/MIME\u307e\u305f\u306fMicrosoft Purview\u6697\u53f7\u5316\u30e1\u30fc\u30eb\u3092\u9001\u4fe1 |Microsoft\u30b5\u30dd\u30fc\u30c8<\/a>\u3002<\/li>\n<p>  <\/ul>\n<p>  <\/li>\n<p>  <\/p>\n<li>\u30af\u30e9\u30b7\u30c3\u30afOutlook\u304b\u3089\u79fb\u884c\u3059\u308b\u30e6\u30fc\u30b6\u30fc\u5411\u3051\u306e\u5185\u90e8\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3092\u66f4\u65b0\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<p>  <\/p>\n<li>\u3053\u306e\u8a3c\u660e\u66f8\u53d6\u308a\u6271\u3044\u7d4c\u9a13\u306e\u5411\u4e0a\u3092\u30d8\u30eb\u30d7\u30c7\u30b9\u30af\u30c1\u30fc\u30e0\u306b\u77e5\u3089\u305b\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<p>  <\/ul>\n<p><b>[\u30b3\u30f3\u30d7\u30e9\u30a4\u30a2\u30f3\u30b9\u4e0a\u306e\u8003\u616e\u4e8b\u9805:]<\/b><\/p>\n<table class=\"table table-bordered\">\n<tbody>\n<tr>\n<td><b>\u9762\u7a4d<\/b><\/td>\n<td><b>\u8aac\u660e<\/b><\/td>\n<\/tr>\n<tr>\n<td>\u5909\u66f4\u306f\u65b0\u3057\u3044\u9867\u5ba2\u30c7\u30fc\u30bf\u3092\u4fdd\u5b58\u3057\u307e\u3059\u304b?<\/td>\n<td>Classic Outlook\u306b\u306f\u3059\u3067\u306b\u3053\u306e\u6a5f\u80fd\u304c\u3042\u308a\u3001\u65b0\u3057\u3044Outlook\u306b\u3082\u5c0e\u5165\u4e88\u5b9a\u3067\u3059\u3002S\/MIME\u306e\u516c\u958b\u8a3c\u660e\u66f8\u306fOutlook\u9023\u7d61\u5148\u306b\u4fdd\u5b58\u3055\u308c\u308b\u3053\u3068\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u3053\u308c\u3089\u306f\u9023\u7d61\u5148\u30c7\u30fc\u30bf\u306e\u4e00\u90e8\u3068\u3057\u3066\u6b8b\u3063\u3066\u3044\u307e\u3059\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u3053\u306e\u5909\u66f4\u306f\u65e2\u5b58\u306e\u9867\u5ba2\u30c7\u30fc\u30bf\u306e\u51e6\u7406\u3001\u4fdd\u5b58\u3001\u30a2\u30af\u30bb\u30b9\u65b9\u6cd5\u3092\u5909\u3048\u307e\u3059\u304b?<\/td>\n<td>\u5f93\u6765\u306eOutlook\u9023\u7d61\u5148\u306b\u4fdd\u5b58\u3055\u308c\u3066\u3044\u305f\u8a3c\u660e\u66f8\u3082\u65b0\u3057\u3044Outlook\u3067\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\u3068\u306a\u308a\u3001\u7d99\u7d9a\u6027\u304c\u5411\u4e0a\u3057\u3066\u3044\u307e\u3059\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>MC1302908 | Outlook: Support for storing S\/MIME certificates in contacts in new Outlook Classification stayInf [&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-16314","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/16314","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=16314"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/16314\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=16314"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=16314"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=16314"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}