{"id":14299,"date":"2025-12-16T05:01:35","date_gmt":"2025-12-15T20:01:35","guid":{"rendered":"https:\/\/m365jp.net\/?p=14299"},"modified":"2025-12-16T05:06:09","modified_gmt":"2025-12-15T20:06:09","slug":"mc1197103-exchange-online-activesync-device-support-update","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2025-12-16-mc1197103-exchange-online-activesync-device-support-update","title":{"rendered":"MC1197103 | Exchange Online ActiveSync device support update"},"content":{"rendered":"<div class=\"postie-post\">\n<div>\n<hr>\n<table id=\"section\">\n<tbody>\n<tr>\n<th width=\"95%\">MC1197103 | Exchange Online ActiveSync device support update<\/th>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr>\n<table id=\"data\">\n<tbody>\n<tr>\n<th>Classification<\/th>\n<td>planForChange<\/td>\n<\/tr>\n<tr>\n<th>Last Updated<\/th>\n<td>12\/15\/2025 19:04:08<\/td>\n<\/tr>\n<tr>\n<th>Start Time<\/th>\n<td>12\/15\/2025 19:03:42<\/td>\n<\/tr>\n<tr>\n<th>End Time<\/th>\n<td>05\/30\/2026 07:00:00<\/td>\n<\/tr>\n<tr>\n<th>Action Required By Date<\/th>\n<td>2026-02-28T08:00:00Z<\/td>\n<\/tr>\n<tr>\n<th>Message Content<\/th>\n<td>\n<p><b>Exchange Online ActiveSync Device Support Update<\/b><\/p>\n<p>We\u2019re making a change to improve security and reliability in Exchange Online. Starting  <b>March 1, 2026<\/b>, devices using <b>Exchange ActiveSync (EAS)<\/b> versions lower than 16.1 will no longer be able to connect to Exchange Online. EAS 16.1 was introduced in June 2016 and provides enhanced compatibility and security.<\/p>\n<p><b>When this will happen:<\/b><\/p>\n<p>  <\/p>\n<p>This change begins taking effect on <b>March 1, 2026<\/b>.<\/p>\n<p><b>How this affects your organization:<\/b><\/p>\n<p>  <\/p>\n<p><b>Who is affected:<\/b> Organizations using mobile devices with native email apps to access Exchange Online mailboxes via EAS protocol. Apple devices added support for EAS 16.1 in iOS 10 and are unlikely to be affected. The Gmail app and Samsung Mail will   have updated versions available before the deadline. For other apps you should contact your device or application vendor if they are using EAS versions lower than 16.1.&nbsp;<\/p>\n<p>  <\/p>\n<p><b>What will happen:<\/b><\/p>\n<p>  <\/p>\n<ul>  <\/p>\n<li>Devices running EAS versions lower than 16.1 will no longer connect to Exchange Online.<\/li>\n<p>  <\/p>\n<li>Devices using Outlook Mobile are not impacted because they do not use EAS.<\/li>\n<p>  <\/p>\n<li>This change applies only to Exchange Online, not Exchange Server.<\/li>\n<p>  <\/ul>\n<p><b>What you can do to prepare:<\/b><\/p>\n<p>  <\/p>\n<ul>  <\/p>\n<li>Verify that all mobile devices and applications are updated to EAS version 16.1 or higher before March 1, 2026.<\/li>\n<p>  <\/p>\n<li>Admins can generate a report of devices using older EAS versions with the following PowerShell command:<\/li>\n<p>  <\/ul>\n<pre><code><br>Get-MobileDevice | Where-Object {($_.ClientType -eq 'EAS' -or $_.ClientType -match 'ActiveSync') -and $_.ClientVersion -and ([version]$_.ClientVersion -lt [version]'16.1')} | Sort-Object UserDisplayName | Select-Object UserDisplayName, UserPrincipalName, DeviceId, DeviceModel<br><\/code><\/pre>\n<ul>  <\/p>\n<li>Communicate this change to your helpdesk and end users and ask them to update if possible.<\/li>\n<p>  <\/p>\n<li>Update internal documentation as needed.<\/li>\n<p>  <\/p>\n<li>For assistance, contact your device or application vendor.<\/li>\n<p>  <\/p>\n<li>Learn more: <a href=\"https:\/\/aka.ms\/EASVersionUpdate\">Exchange ActiveSync in Exchange Online<\/a><\/li>\n<p>  <\/ul>\n<p><b>Compliance considerations:<\/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><b>Exchange Online ActiveSync \u30c7\u30d0\u30a4\u30b9\u30b5\u30dd\u30fc\u30c8\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8<\/b><\/p>\n<p>Exchange Online\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3068\u4fe1\u983c\u6027\u3092\u5411\u4e0a\u3055\u305b\u308b\u305f\u3081\u306e\u5909\u66f4\u3092\u52a0\u3048\u3066\u3044\u307e\u3059\u3002 <b>2026\u5e743\u67081\u65e5<\/b>\u4ee5\u964d\u3001 <b>Exchange ActiveSync(EAS)<\/b> \u30d0\u30fc\u30b8\u30e7\u30f316.1\u672a\u6e80\u306e\u30c7\u30d0\u30a4\u30b9\u306fExchange Online\u306b\u63a5\u7d9a\u3067\u304d\u306a\u304f\u306a\u308a\u307e\u3059\u3002EAS 16.1\u306f2016\u5e746\u6708\u306b\u5c0e\u5165\u3055\u308c\u3001\u4e92\u63db\u6027\u3068\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u5411\u4e0a\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/p>\n<p><b>\u305d\u306e\u6642\u671f:<\/b><\/p>\n<p>  <\/p>\n<p>\u3053\u306e\u5909\u66f4 <b>\u306f2026\u5e743\u67081<\/b>\u65e5\u304b\u3089\u65bd\u884c\u3055\u308c\u307e\u3059\u3002<\/p>\n<p><b>\u3053\u308c\u304c\u3042\u306a\u305f\u306e\u7d44\u7e54\u306b\u4e0e\u3048\u308b\u5f71\u97ff:<\/b><\/p>\n<p>  <\/p>\n<p><b>\u5f71\u97ff\u3092\u53d7\u3051\u308b\u4eba\u7269:<\/b> \u7d44\u7e54\u306f\u3001\u30e2\u30d0\u30a4\u30eb\u30c7\u30d0\u30a4\u30b9\u3067\u30cd\u30a4\u30c6\u30a3\u30d6\u30e1\u30fc\u30eb\u30a2\u30d7\u30ea\u3092\u4f7f\u3044\u3001EAS\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u901a\u3058\u3066Exchange Online\u306e\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u306b\u30a2\u30af\u30bb\u30b9\u3057\u307e\u3059\u3002Apple\u30c7\u30d0\u30a4\u30b9\u306fiOS 10\u3067EAS 16.1\u306e\u30b5\u30dd\u30fc\u30c8\u3092\u8ffd\u52a0\u3057\u3001\u5f71\u97ff\u3092\u53d7\u3051\u308b\u53ef\u80fd\u6027\u306f\u4f4e\u3044\u3067\u3059\u3002Gmail\u30a2\u30d7\u30ea\u3068Samsung Mail\u306f\u671f\u9650\u524d\u306b\u66f4\u65b0\u7248\u304c\u5229\u7528\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u4ed6\u306e\u30a2\u30d7\u30ea\u306b\u3064\u3044\u3066\u306f\u3001EAS\u30d0\u30fc\u30b8\u30e7\u30f316.1\u672a\u6e80\u306e\u5834\u5408\u306f\u3001\u30c7\u30d0\u30a4\u30b9\u3084\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30d9\u30f3\u30c0\u30fc\u306b\u9023\u7d61\u3057\u3066\u304f\u3060\u3055\u3044\u3002&nbsp;<\/p>\n<p>  <\/p>\n<p><b>\u4eca\u5f8c\u306e\u5c55\u958b:<\/b><\/p>\n<p>  <\/p>\n<ul>  <\/p>\n<li>16.1\u672a\u6e80\u306eEAS\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u30c7\u30d0\u30a4\u30b9\u306fExchange Online\u306b\u63a5\u7d9a\u3067\u304d\u307e\u305b\u3093\u3002<\/li>\n<p>  <\/p>\n<li>Outlook Mobile\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u30c7\u30d0\u30a4\u30b9\u306fEAS\u3092\u4f7f\u308f\u306a\u3044\u305f\u3081\u5f71\u97ff\u3092\u53d7\u3051\u307e\u305b\u3093\u3002<\/li>\n<p>  <\/p>\n<li>\u3053\u306e\u5909\u66f4\u306fExchange Online\u306b\u306e\u307f\u9069\u7528\u3055\u308c\u3001Exchange Server\u306b\u306f\u9069\u7528\u3055\u308c\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>\u3059\u3079\u3066\u306e\u30e2\u30d0\u30a4\u30eb\u30c7\u30d0\u30a4\u30b9\u3068\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c2026\u5e743\u67081\u65e5\u307e\u3067\u306bEAS\u30d0\u30fc\u30b8\u30e7\u30f316.1\u4ee5\u4e0a\u306b\u66f4\u65b0\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<p>  <\/p>\n<li>\u7ba1\u7406\u8005\u306f\u3001\u4ee5\u4e0b\u306ePowerShell\u30b3\u30de\u30f3\u30c9\u3067\u53e4\u3044EAS\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u4f7f\u7528\u3059\u308b\u30c7\u30d0\u30a4\u30b9\u306e\u30ec\u30dd\u30fc\u30c8\u3092\u4f5c\u6210\u3067\u304d\u307e\u3059:<\/li>\n<p>  <\/ul>\n<pre><code><br>Get-MobileDevice | Where-Object {($_.ClientType -eq 'EAS' -or $_.ClientType -match 'ActiveSync') -and $_.ClientVersion -and ([version]$_.ClientVersion -lt [version]'16.1')} | Sort-Object UserDisplayName | Select-Object UserDisplayName, UserPrincipalName, DeviceId, DeviceModel<br><\/code><\/pre>\n<ul>  <\/p>\n<li>\u3053\u306e\u5909\u66f4\u3092\u30d8\u30eb\u30d7\u30c7\u30b9\u30af\u3084\u30a8\u30f3\u30c9\u30e6\u30fc\u30b6\u30fc\u306b\u4f1d\u3048\u3001\u53ef\u80fd\u3067\u3042\u308c\u3070\u66f4\u65b0\u3092\u304a\u9858\u3044\u3057\u307e\u3057\u3087\u3046\u3002<\/li>\n<p>  <\/p>\n<li>\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u5185\u90e8\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3092\u66f4\u65b0\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<p>  <\/p>\n<li>\u30b5\u30dd\u30fc\u30c8\u304c\u5fc5\u8981\u306a\u5834\u5408\u306f\u3001\u30c7\u30d0\u30a4\u30b9\u3084\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30d9\u30f3\u30c0\u30fc\u306b\u304a\u554f\u3044\u5408\u308f\u305b\u304f\u3060\u3055\u3044\u3002<\/li>\n<p>  <\/p>\n<li>\u8a73\u3057\u304f\u306f\u3053\u3061\u3089: <a href=\"https:\/\/aka.ms\/EASVersionUpdate\">Exchange Online\u306b\u304a\u3051\u308bExchange ActiveSync\u5bfe\u5fdc<\/a><\/li>\n<p>  <\/ul>\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>MC1197103 | Exchange Online ActiveSync device support update Classification planForChange Last Updated 12\/15\/2 [&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-14299","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/14299","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=14299"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/14299\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=14299"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=14299"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=14299"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}