{"id":14356,"date":"2025-12-18T04:01:33","date_gmt":"2025-12-17T19:01:33","guid":{"rendered":"https:\/\/m365jp.net\/?p=14356"},"modified":"2025-12-18T04:06:07","modified_gmt":"2025-12-17T19:06:07","slug":"mc1189656-updated-upcoming-change-to-teams-desktop-client-on-windows-5","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2025-12-18-mc1189656-updated-upcoming-change-to-teams-desktop-client-on-windows-5","title":{"rendered":"MC1189656 | (Updated) Upcoming Change to Teams Desktop Client on Windows"},"content":{"rendered":"<div class=\"postie-post\">\n<div>\n<hr>\n<table id=\"section\">\n<tbody>\n<tr>\n<th width=\"95%\">MC1189656 | (Updated) Upcoming Change to Teams Desktop Client on Windows<\/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\/17\/2025 18:18:50<\/td>\n<\/tr>\n<tr>\n<th>Start Time<\/th>\n<td>11\/25\/2025 00:00:52<\/td>\n<\/tr>\n<tr>\n<th>End Time<\/th>\n<td>02\/02\/2026 08:00:00<\/td>\n<\/tr>\n<tr>\n<th>Message Content<\/th>\n<td>\n<p>Updated December 17, 2025: We understand that implementing the current guidance involves considerable effort for administrators, and we are actively working to reduce this impact. We are exploring ways to make policy changes as seamless as possible, in close   partnership with the Windows team.<\/p>\n<p>Given this ongoing work, we recommend pausing any testing or configuration updates related to this feature. Updated instructions and revised guidance will be shared as part of the formal communication planned for January 2026.<\/p>\n<p>Thank you for the valuable feedback we\u2019ve received. We are currently reassessing the rollout timelines to ensure alignment with your needs and operational requirements. You can expect a formal update from us by mid to late January 2026.<\/p>\n<p><b>[Introduction]<\/b>  <\/p>\n<p>We\u2019re improving the performance and startup time of calling features in the Microsoft Teams Desktop Client for Windows. To achieve this, we\u2019re introducing a new child process named  <i>ms-teams_modulehost.exe<\/i> that will handle the calling stack separately from the main application process (<i>ms-teams.exe<\/i>). This change optimizes resource usage and enhances meeting experiences.<\/p>\n<p>  <b>[When this will happen:]<\/b>  <\/p>\n<p>Updated rollout timing will be announced in January 2026<\/p>\n<p>Note: Timelines may shift due to year-end feature flag rollout freeze.<\/p>\n<p>  <b>[How this affects your organization:]<\/b>  <\/p>\n<ul>  <\/p>\n<li><b>Who is affected:<\/b> All users running the Teams Desktop Client on Windows.<\/li>\n<p>  <\/p>\n<li><b>What will happen:<\/b><br \/> \n<ul>  <\/p>\n<li>A new process (<i>ms-teams_modulehost.exe<\/i>) will appear in Task Manager under the main Teams process (<i>ms-teams.exe<\/i>).<\/li>\n<p>  <\/p>\n<li>This process is dedicated to calling features and improves performance.<\/li>\n<p>  <\/p>\n<li>No changes to user workflows or UI; however, admins should ensure endpoint and security software allow this new process.<\/li>\n<p>  <\/ul>\n<p>  <\/li>\n<p>  <\/ul>\n<p>  <b>[What you can do to prepare:]<\/b>  <\/p>\n<ul>  <\/p>\n<li>Update endpoint management and security software to allowlist <i>ms-teams_modulehost.exe<\/i> alongside  <i>ms-teams.exe<\/i>.<\/li>\n<p>  <\/p>\n<li>Communicate this change to helpdesk staff to avoid confusion during troubleshooting.<\/li>\n<p>  <\/p>\n<li>Update internal documentation if you reference Teams process names.<\/li>\n<li>Make sure the same QoS settings applied to <i>ms-teams.exe<\/i> are also applied to  <i>ms-teams_modulehost.exe<\/i>. Refer to this page for details: <a href=\"https:\/\/learn.microsoft.com\/microsoftteams\/qos-in-teams\" target=\"_blank\">  Implement Quality of Service (QoS) in Microsoft Teams<\/a>\n<ul>\n<li><b>DO NOT<\/b> remove QoS settings of <i>ms-teams.exe<\/i>. Only add QoS settings for  <i>ms-teams_modulehost.exe<\/i>.<\/li>\n<\/ul>\n<\/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<p>  <\/p>\n<\/td>\n<\/tr>\n<tr>\n<th>Machine Translation<\/th>\n<td>\n<p>2025\u5e7412\u670817\u65e5\u66f4\u65b0:\u73fe\u884c\u30ac\u30a4\u30c0\u30f3\u30b9\u306e\u5b9f\u65bd\u306b\u306f\u7ba1\u7406\u8005\u306b\u3068\u3063\u3066\u591a\u5927\u306a\u52b4\u529b\u304c\u5fc5\u8981\u3067\u3042\u308b\u3053\u3068\u3092\u7406\u89e3\u3057\u3066\u304a\u308a\u3001\u305d\u306e\u5f71\u97ff\u3092\u6e1b\u3089\u3059\u305f\u3081\u306b\u7a4d\u6975\u7684\u306b\u53d6\u308a\u7d44\u3093\u3067\u3044\u307e\u3059\u3002\u79c1\u305f\u3061\u306fWindows\u30c1\u30fc\u30e0\u3068\u5bc6\u63a5\u306b\u9023\u643a\u3057\u3001\u30dd\u30ea\u30b7\u30fc\u5909\u66f4\u3092\u3067\u304d\u308b\u3060\u3051\u30b7\u30fc\u30e0\u30ec\u30b9\u306b\u3059\u308b\u65b9\u6cd5\u3092\u6a21\u7d22\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u7d99\u7d9a\u7684\u306a\u4f5c\u696d\u3092\u8e0f\u307e\u3048\u3001\u3053\u306e\u6a5f\u80fd\u306b\u95a2\u9023\u3059\u308b\u30c6\u30b9\u30c8\u3084\u8a2d\u5b9a\u66f4\u65b0\u306f\u4e00\u6642\u505c\u6b62\u3059\u308b\u3053\u3068\u3092\u63a8\u5968\u3057\u307e\u3059\u3002\u66f4\u65b0\u3055\u308c\u305f\u6307\u793a\u3068\u6539\u8a02\u3055\u308c\u305f\u30ac\u30a4\u30c0\u30f3\u30b9\u306f\u30012026\u5e741\u6708\u306b\u4e88\u5b9a\u3055\u308c\u3066\u3044\u308b\u6b63\u5f0f\u306a\u30b3\u30df\u30e5\u30cb\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u4e00\u74b0\u3068\u3057\u3066\u5171\u6709\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>\u8cb4\u91cd\u306a\u30d5\u30a3\u30fc\u30c9\u30d0\u30c3\u30af\u3092\u3044\u305f\u3060\u304d\u3001\u3042\u308a\u304c\u3068\u3046\u3054\u3056\u3044\u307e\u3059\u3002\u73fe\u5728\u3001\u5c55\u958b\u30b9\u30b1\u30b8\u30e5\u30fc\u30eb\u3092\u518d\u8a55\u4fa1\u3057\u3001\u304a\u5ba2\u69d8\u306e\u30cb\u30fc\u30ba\u3084\u904b\u7528\u8981\u4ef6\u306b\u5408\u81f4\u3055\u305b\u308b\u3088\u3046\u9032\u3081\u3066\u3044\u307e\u3059\u30022026\u5e741\u6708\u4e2d\u65ec\u304b\u3089\u4e0b\u65ec\u306b\u304b\u3051\u3066\u6b63\u5f0f\u306a\u66f4\u65b0\u3092\u304a\u5c4a\u3051\u3057\u307e\u3059\u3002<\/p>\n<p><b>[\u306f\u3058\u3081\u306b]<\/b>  <\/p>\n<p>Windows \u7248 Microsoft Teams Desktop Client \u306e\u901a\u8a71\u6a5f\u80fd\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u8d77\u52d5\u6642\u9593\u3092\u6539\u5584\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3092\u5b9f\u73fe\u3059\u308b\u305f\u3081\u306b\u3001  <i>ms-teams_modulehost.exe<\/i> \u3068\u3044\u3046\u65b0\u3057\u3044\u5b50\u30d7\u30ed\u30bb\u30b9\u3092\u5c0e\u5165\u3057\u3001\u30e1\u30a4\u30f3\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30d7\u30ed\u30bb\u30b9(<i>ms-teams.exe<\/i>)\u3068\u306f\u5225\u306b\u547c\u3073\u51fa\u3057\u30b9\u30bf\u30c3\u30af\u3092\u6271\u3044\u307e\u3059\u3002\u3053\u306e\u5909\u66f4\u306b\u3088\u308a\u30ea\u30bd\u30fc\u30b9\u306e\u5229\u7528\u304c\u6700\u9069\u5316\u3055\u308c\u3001\u4f1a\u8b70\u4f53\u9a13\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>\n<p>  <b>[\u3044\u3064\u8d77\u3053\u308b\u304b:]<\/b>  <\/p>\n<p>\u6700\u65b0\u306e\u5c55\u958b\u65e5\u7a0b\u306f2026\u5e741\u6708\u306b\u767a\u8868\u3055\u308c\u307e\u3059<\/p>\n<p>\u6ce8:\u5e74\u672b\u306e\u6a5f\u80fd\u30d5\u30e9\u30b0\u306e\u5c0e\u5165\u51cd\u7d50\u306b\u3088\u308a\u30b9\u30b1\u30b8\u30e5\u30fc\u30eb\u304c\u5909\u66f4\u3055\u308c\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\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<ul>  <\/p>\n<li><b>\u5f71\u97ff\u3092\u53d7\u3051\u308b\u4eba\u7269:<\/b> Windows\u3067Teams Desktop\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3092\u904b\u7528\u3057\u3066\u3044\u308b\u3059\u3079\u3066\u306e\u30e6\u30fc\u30b6\u30fc\u3002<\/li>\n<p>  <\/p>\n<li><b>\u4eca\u5f8c\u306e\u5c55\u958b:<\/b><br \/> \n<ul>  <\/p>\n<li>\u30bf\u30b9\u30af\u30de\u30cd\u30fc\u30b8\u30e3\u30fc\u306e\u30e1\u30a4\u30f3\u306eTeams\u30d7\u30ed\u30bb\u30b9(<i>ms-teams.exe<\/i>)\u306e\u4e0b\u306b\u65b0\u3057\u3044\u30d7\u30ed\u30bb\u30b9(<i>ms-teams_modulehost.exe<\/i>)\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/li>\n<p>  <\/p>\n<li>\u3053\u306e\u30d7\u30ed\u30bb\u30b9\u306f\u6a5f\u80fd\u3092\u547c\u3073\u51fa\u3057\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u306b\u5c02\u5ff5\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n<p>  <\/p>\n<li>\u30e6\u30fc\u30b6\u30fc\u306e\u30ef\u30fc\u30af\u30d5\u30ed\u30fc\u3084UI\u306e\u5909\u66f4\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u3057\u304b\u3057\u3001\u7ba1\u7406\u8005\u306f\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u304a\u3088\u3073\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u304c\u3053\u306e\u65b0\u3057\u3044\u30d7\u30ed\u30bb\u30b9\u3092\u53ef\u80fd\u306b\u3057\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<p>  <\/ul>\n<p>  <\/li>\n<p>  <\/ul>\n<p>  <b>[\u6e96\u5099\u306e\u305f\u3081\u306b\u3067\u304d\u308b\u3053\u3068:]<\/b>  <\/p>\n<ul>  <\/p>\n<li>\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u7ba1\u7406\u304a\u3088\u3073\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u3092<i>ms-teams.exe<\/i>\u3068\u4f75\u305b\u3066<i>ms-teams_modulehost.exe<\/i>\u3092\u8a31\u53ef\u30ea\u30b9\u30c8\u306b\u66f4\u65b0\u3057\u307e\u3057\u3087\u3046\u3002<\/li>\n<p>  <\/p>\n<li>\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u4e2d\u306e\u6df7\u4e71\u3092\u907f\u3051\u308b\u305f\u3081\u306b\u3001\u3053\u306e\u5909\u66f4\u3092\u30d8\u30eb\u30d7\u30c7\u30b9\u30af\u30b9\u30bf\u30c3\u30d5\u306b\u4f1d\u3048\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<p>  <\/p>\n<li>Teams\u306e\u30d7\u30ed\u30bb\u30b9\u540d\u3092\u53c2\u7167\u3059\u308b\u5834\u5408\u306f\u5185\u90e8\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3092\u66f4\u65b0\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<li><i>ms-teams.exe<\/i>\u306b\u9069\u7528\u3057\u305fQoS\u8a2d\u5b9a\u304c<i>ms-teams_modulehost.exe<\/i>\u306b\u3082\u9069\u7528\u3055\u308c\u308b\u304b\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u8a73\u7d30\u306f\u3053\u306e\u30da\u30fc\u30b8\u3092\u3054\u89a7\u304f\u3060\u3055\u3044:<a href=\"https:\/\/learn.microsoft.com\/microsoftteams\/qos-in-teams\" target=\"_blank\">Microsoft Teams\u306b\u304a\u3051\u308bQuality of Service(QoS)\u306e\u5b9f\u88c5<\/a>\n<ul>\n<li><i>ms-teams.exe<\/i>\u306eQoS\u8a2d\u5b9a\u306f\u524a\u9664<b>\u3057\u306a\u3044\u3067\u304f\u3060\u3055\u3044<\/b>\u3002QoS\u8a2d\u5b9a\u306f<i>ms-teams_modulehost.exe<\/i>\u3060\u3051\u8ffd\u52a0\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<\/ul>\n<\/li>\n<p>  <\/ul>\n<p>  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