{"id":19047,"date":"2026-10-17T06:02:27","date_gmt":"2026-10-16T21:02:27","guid":{"rendered":"https:\/\/m365jp.net\/?p=19047"},"modified":"2026-10-17T06:02:35","modified_gmt":"2026-10-16T21:02:35","slug":"mc1511071-action-required-review-property-changes-for-exchange-online-scenarios","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-10-17-mc1511071-action-required-review-property-changes-for-exchange-online-scenarios","title":{"rendered":"MC1511071 | Action required: Review property changes for Exchange Online scenarios"},"content":{"rendered":"<div class=\"postie-post\">\n<div>\n<hr>\n<table id=\"section\">\n<tbody>\n<tr>\n<th width=\"95%\">MC1511071 | Action required: Review property changes for Exchange Online scenarios<\/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>10\/16\/2026 20:24:53<\/td>\n<\/tr>\n<tr>\n<th>Start Time<\/th>\n<td>10\/16\/2026 20:14:11<\/td>\n<\/tr>\n<tr>\n<th>End Time<\/th>\n<td>02\/15\/2027 08:00:00<\/td>\n<\/tr>\n<tr>\n<th>Action Required By Date<\/th>\n<td>2026-11-15T08:00:00Z<\/td>\n<\/tr>\n<tr>\n<th>Message Content<\/th>\n<td>\n<p>[What and why:]<\/p>\n<p>As part of our ongoing Exchange Online management and directory modernization efforts, we&#8217;re simplifying legacy management scenarios and removing properties. We are deprecating selected properties returned or used with the following Exchange Online PowerShell  scenarios:<\/p>\n<ul>\n<li>Get-Mailbox -Migration<\/li>\n<li>New-Mailbox -Migration<\/li>\n<\/ul>\n<p>If your scripts, applications, or automation use these scenarios, review the affected properties and determine whether your workflows depend on them.<\/p>\n<p>The change will be introduced in two phases:<\/p>\n<ul>\n<li>Beginning November 15, 2026: Selected properties will no longer be returned in applicable Get-Mailbox -Migration and New-Mailbox -Migration responses.<\/li>\n<li>Beginning December 15, 2026: The affected properties will be blocked from being configured through applicable New-Mailbox -Migration scenarios.<\/li>\n<\/ul>\n<p>[Rollout schedule:]<\/p>\n<p>We will begin rolling out mid-November 2026 and expect to complete by mid-November 2026.<\/p>\n<p>[Impact on your organization:]<\/p>\n<p>Your organization may be affected if you have scripts, applications, third-party solutions, or operational workflows that use the affected properties with -Migration scenarios.<\/p>\n<p>For example, a script using: <code>Get-Mailbox -Migration<\/code> will no longer receive the affected properties in the returned object beginning November 10, 2026. This may affect automation that depends on those properties being present or expects a fixed  set of properties in the response. If your workflows don&#8217;t use any of the affected properties, no action is required.<\/p>\n<p>[Action required \/ Recommendations:]<\/p>\n<p>Before November 15, 2026:<\/p>\n<ol>\n<li>Review scripts, applications, and integrations that use Get-Mailbox -Migration, New-Mailbox -Migration, or Set-Mailbox -Migration.<\/li>\n<li>Review the published list of affected properties.<\/li>\n<li>Identify whether your workflows depend on any affected property.<\/li>\n<li>Update and test affected workflows to remove the dependency.<\/li>\n<li>For the complete list of affected properties and additional guidance, see: <a href=\"https:\/\/learn.microsoft.com\/en-us\/exchange\/get-new-mailbox-migration\" target=\"_blank\"> Changes to Get-Mailbox and New-Mailbox specifically with the Migration parameter | Microsoft Learn<\/a>.<\/li>\n<\/ol>\n<p>Required Actions<\/p>\n<p>Review your -Migration workflows and make any required changes before November 15, 2026.<\/p>\n<p>If an affected property is required for your scenario and you can&#8217;t remove the dependency, contact Microsoft Support and provide the property name, cmdlet, usage scenario, and expected impact.<\/p>\n<\/td>\n<\/tr>\n<tr>\n<th>Machine Translation<\/th>\n<td>\n<p>[\u4f55\u3092\u3001\u306a\u305c:]<\/p>\n<p>Exchange Online\u306e\u7ba1\u7406\u304a\u3088\u3073\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306e\u8fd1\u4ee3\u5316\u306e\u4e00\u74b0\u3068\u3057\u3066\u3001\u30ec\u30ac\u30b7\u30fc\u7ba1\u7406\u30b7\u30ca\u30ea\u30aa\u3092\u7c21\u7d20\u5316\u3057\u3001\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u524a\u9664\u3057\u3066\u3044\u307e\u3059\u3002\u4ee5\u4e0b\u306eExchange Online PowerShell\u30b7\u30ca\u30ea\u30aa\u3067\u623b\u3055\u308c\u305f\u307e\u305f\u306f\u4f7f\u7528\u3055\u308c\u305f\u7279\u5b9a\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u306f\u975e\u63a8\u5968\u5316\u3057\u307e\u3059\u3002<\/p>\n<ul>\n<li>Get-Mailbox -Migration<\/li>\n<li>New-Mailbox -Migration<\/li>\n<\/ul>\n<p>\u30b9\u30af\u30ea\u30d7\u30c8\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3001\u81ea\u52d5\u5316\u304c\u3053\u308c\u3089\u306e\u30b7\u30ca\u30ea\u30aa\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u5f71\u97ff\u3092\u53d7\u3051\u308b\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u78ba\u8a8d\u3057\u3001\u30ef\u30fc\u30af\u30d5\u30ed\u30fc\u304c\u305d\u308c\u306b\u4f9d\u5b58\u3057\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u5224\u65ad\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>\u3053\u306e\u5909\u66f4\u306f2\u6bb5\u968e\u3067\u5c0e\u5165\u3055\u308c\u307e\u3059\u3002<\/p>\n<ul>\n<li>2026\u5e7411\u670815\u65e5\u3088\u308a:\u9078\u3070\u308c\u305f\u7269\u4ef6\u306f\u3001\u8a72\u5f53\u3059\u308b\u300cGet-Mailbox -Migration\u300d\u304a\u3088\u3073\u300cNew-Mailbox -Migration\u300d\u306e\u56de\u7b54\u3067\u8fd4\u5374\u3055\u308c\u306a\u304f\u306a\u308a\u307e\u3059\u3002<\/li>\n<li>2026\u5e7412\u670815\u65e5\u3088\u308a:\u5f71\u97ff\u3092\u53d7\u3051\u305f\u30d7\u30ed\u30d1\u30c6\u30a3\u306f\u3001\u8a72\u5f53\u3059\u308bNew-Mailbox -Migration\u30b7\u30ca\u30ea\u30aa\u3092\u901a\u3058\u3066\u8a2d\u5b9a\u304c\u30d6\u30ed\u30c3\u30af\u3055\u308c\u307e\u3059\u3002<\/li>\n<\/ul>\n<p>[\u5c55\u958b\u30b9\u30b1\u30b8\u30e5\u30fc\u30eb:]<\/p>\n<p>2026\u5e7411\u6708\u4e2d\u65ec\u304b\u3089\u5c55\u958b\u3092\u958b\u59cb\u3057\u300111\u6708\u4e2d\u65ec\u307e\u3067\u306b\u5b8c\u4e86\u3059\u308b\u4e88\u5b9a\u3067\u3059\u3002<\/p>\n<p>[\u7d44\u7e54\u3078\u306e\u5f71\u97ff:]<\/p>\n<p>\u5f71\u97ff\u3092\u53d7\u3051\u308b\u30d7\u30ed\u30d1\u30c6\u30a3\u3092-Migration\u30b7\u30ca\u30ea\u30aa\u3067\u4f7f\u7528\u3057\u3066\u3044\u308b\u30b9\u30af\u30ea\u30d7\u30c8\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3001\u30b5\u30fc\u30c9\u30d1\u30fc\u30c6\u30a3\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3001\u904b\u7528\u30ef\u30fc\u30af\u30d5\u30ed\u30fc\u304c\u3044\u308c\u3070\u3001\u7d44\u7e54\u304c\u5f71\u97ff\u3092\u53d7\u3051\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u3001 <code>Get-Mailbox -Migration<\/code> \u3092\u4f7f\u3046\u30b9\u30af\u30ea\u30d7\u30c8\u306f\u30012026\u5e7411\u670810\u65e5\u4ee5\u964d\u3001\u8fd4\u9084\u3055\u308c\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u5185\u306e\u5f71\u97ff\u3092\u53d7\u3051\u305f\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u53d7\u3051\u53d6\u3089\u306a\u304f\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u3053\u308c\u3089\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u304c\u5b58\u5728\u3059\u308b\u3053\u3068\u306b\u4f9d\u5b58\u3057\u305f\u308a\u3001\u30ec\u30b9\u30dd\u30f3\u30b9\u306b\u56fa\u5b9a\u3055\u308c\u305f\u30d7\u30ed\u30d1\u30c6\u30a3\u30bb\u30c3\u30c8\u3092\u671f\u5f85\u3059\u308b\u81ea\u52d5\u5316\u306b\u5f71\u97ff\u304c\u51fa\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u3082\u3057\u30ef\u30fc\u30af\u30d5\u30ed\u30fc\u304c\u5f71\u97ff\u3092\u53d7\u3051\u305f\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u4e00\u5207\u4f7f\u308f\u306a\u3051\u308c\u3070\u3001\u4f55\u306e\u30a2\u30af\u30b7\u30e7\u30f3\u3082\u5fc5\u8981\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>[\u5fc5\u8981\u306a\u884c\u52d5\/\u63a8\u5968\u4e8b\u9805:]<\/p>\n<p>2026\u5e7411\u670815\u65e5\u4ee5\u524d:<\/p>\n<ol>\n<li>Get-Mailbox -Migration\u3001New-Mailbox -Migration\u3001\u307e\u305f\u306fSet-Mailbox -Migration\u3092\u4f7f\u7528\u3059\u308b\u30b9\u30af\u30ea\u30d7\u30c8\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3001\u7d71\u5408\u3092\u898b\u76f4\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<li>\u5f71\u97ff\u3092\u53d7\u3051\u308b\u7269\u4ef6\u306e\u30ea\u30b9\u30c8\u3092\u516c\u958b\u3057\u305f\u30ea\u30b9\u30c8\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<li>\u30ef\u30fc\u30af\u30d5\u30ed\u30fc\u304c\u5f71\u97ff\u3092\u53d7\u3051\u308b\u7269\u4ef6\u306b\u4f9d\u5b58\u3057\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u7279\u5b9a\u3057\u307e\u3057\u3087\u3046\u3002<\/li>\n<li>\u5f71\u97ff\u3092\u53d7\u3051\u305f\u30ef\u30fc\u30af\u30d5\u30ed\u30fc\u3092\u66f4\u65b0\u30fb\u30c6\u30b9\u30c8\u3057\u3066\u4f9d\u5b58\u3092\u9664\u53bb\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<li>\u5f71\u97ff\u3092\u53d7\u3051\u308b\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u5b8c\u5168\u306a\u30ea\u30b9\u30c8\u304a\u3088\u3073\u8ffd\u52a0\u306e\u30ac\u30a4\u30c0\u30f3\u30b9\u306b\u3064\u3044\u3066\u306f\u3001\u4ee5\u4e0b\u3092\u3054\u89a7\u304f\u3060\u3055\u3044: <a href=\"https:\/\/learn.microsoft.com\/en-us\/exchange\/get-new-mailbox-migration\" target=\"_blank\"> Migration\u30d1\u30e9\u30e1\u30fc\u30bf\u306b\u95a2\u3059\u308bGet-Mailbox\u304a\u3088\u3073New-Mailbox\u306e\u5909\u66f4 |Microsoft Learn<\/a>\u3002<\/li>\n<\/ol>\n<p>\u5fc5\u8981\u306a\u884c\u52d5<\/p>\n<p>-Migration\u306e\u30ef\u30fc\u30af\u30d5\u30ed\u30fc\u3092\u898b\u76f4\u3057\u30012026\u5e7411\u670815\u65e5\u307e\u3067\u306b\u5fc5\u8981\u306a\u5909\u66f4\u3092\u884c\u3044\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\u5f71\u97ff\u3092\u53d7\u3051\u308b\u30d7\u30ed\u30d1\u30c6\u30a3\u304c\u30b7\u30ca\u30ea\u30aa\u3067\u5fc5\u8981\u3067\u3001\u4f9d\u5b58\u95a2\u4fc2\u3092\u89e3\u9664\u3067\u304d\u306a\u3044\u5834\u5408\u306f\u3001Microsoft \u30b5\u30dd\u30fc\u30c8\u306b\u9023\u7d61\u3057\u3001\u30d7\u30ed\u30d1\u30c6\u30a3\u540d\u3001\u30b3\u30de\u30f3\u30c9\u30ec\u30c3\u30c8\u3001\u4f7f\u7528\u72b6\u6cc1\u3001\u4e88\u60f3\u3055\u308c\u308b\u5f71\u97ff\u3092\u4f1d\u3048\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>MC1511071 | Action required: Review property changes for Exchange Online scenarios Classification planForChang 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