{"id":18072,"date":"2026-08-26T06:01:23","date_gmt":"2026-08-25T21:01:23","guid":{"rendered":"https:\/\/m365jp.net\/?p=18072"},"modified":"2026-08-26T06:15:22","modified_gmt":"2026-08-25T21:15:22","slug":"mc1446796-updated-migrate-free-busy-mailtips-and-calendar-sharing-before-ews-deprecation-3","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-08-26-mc1446796-updated-migrate-free-busy-mailtips-and-calendar-sharing-before-ews-deprecation-3","title":{"rendered":"MC1446796 | (Updated) Migrate Free\/Busy, MailTips, and Calendar Sharing before EWS deprecation"},"content":{"rendered":"<div class=\"postie-post\">\n<div>\n<hr>\n<table id=\"section\">\n<tbody>\n<tr>\n<th width=\"95%\">MC1446796 | (Updated) Migrate Free\/Busy, MailTips, and Calendar Sharing before EWS deprecation<\/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>08\/25\/2026 20:19:17<\/td>\n<\/tr>\n<tr>\n<th>Start Time<\/th>\n<td>08\/03\/2026 22:18:34<\/td>\n<\/tr>\n<tr>\n<th>End Time<\/th>\n<td>12\/28\/2026 08:00:00<\/td>\n<\/tr>\n<tr>\n<th>Action Required By Date<\/th>\n<td>2026-10-01T07:00:00Z<\/td>\n<\/tr>\n<tr>\n<th>Message Content<\/th>\n<td>\n<p>Updated August 25, 2026: We have updated the content and timeline. Thank you for your patience.&nbsp;<\/p>\n<p>[What and Why:]<\/p>\n<p>Exchange Web Services (EWS)<br \/>  deprecation begins <b>October 1, 2026<\/b>. Cross-tenant collaboration features<br \/>  \u2014 Free\/Busy, MailTips, and Calendar Sharing \u2014 currently rely on EWS.<\/p>\n<p>Cross-tenant Free\/Busy,<br \/>  MailTips, and Calendar Sharing via Microsoft 365 Cross-Tenant Access Policy,<br \/>  which replaces EWS-based cross-tenant collaboration, will be available starting <b>  September 2026<\/b>.<\/p>\n<p>[Rollout Schedule:]<\/p>\n<ul>\n<li>Worldwide: We will begin rolling out in August 2026 and expect to complete by September 15, 2026.<\/li>\n<li>GCC: We will begin rolling out early September 2026 (previously mid-August) and expect to complete by September 30, 2026 (previously mid-September).<\/li>\n<li>GCC High: We will begin rolling out early September 2026 and expect to complete by September 30, 2026.<\/li>\n<li>DoD: We will begin rolling out early September 2026 and expect to complete by October 30, 2026 (previously end of September).<\/li>\n<\/ul>\n<p>[Impact on your organization:]<\/p>\n<p>Sharing Free\/Busy, Calendars,<br \/>  and MailTips (e.g., out of office message) with another Microsoft 365<br \/>  organization via Organization Relationship or<br \/>  Sharing Policy relies on Exchange Web Services (EWS), which is being<br \/>  deprecated. To preserve these cross-tenant collaboration scenarios, you will<br \/>  need to start migrating to Microsoft 365 Cross Tenant Access Policy.<\/p>\n<p>Your tenant is affected if it uses<br \/>  any of the following Exchange Online configurations:<\/p>\n<ul>\n<li><b>Organization Relationships<\/b> \u2014 sharing Free\/Busy<br \/>  or MailTips with other Microsoft 365 tenants&nbsp;<\/li>\n<li><span><span><b>Sharing Policies<\/b> \u2014 sharing calendars<br \/>  externally, either via invitations sent to recipients in other Microsoft 365<br \/>  organizations or calendars published for anonymous access via an internet URL<\/span><\/span><\/li>\n<\/ul>\n<p>Run these commands in Exchange Online<br \/>  PowerShell to check if your tenant is affected:&nbsp;<\/p>\n<ul>\n<li><code>Get-OrganizationRelationship<br \/>  | Format-List Name, DomainNames, Enabled, FreeBusyAccessEnabled,<br \/>  FreeBusyAccessLevel, FreeBusyAccessScope, MailTipsAccessEnabled,<br \/>  MailTipsAccessLevel, MailTipsAccessScope<\/code><span><\/span>\n<ul>\n<li><span>If results show<br \/>  (1) Enabled: True, and (2) either FreeBusyAccessEnabled: True or<br \/>  MailtipsAccessEnabled: True, and (3) the external organization is hosted in<br \/>  Microsoft 365, your tenant is affected and in scope to migrate. Else, no action<br \/>  is needed.<\/span>&nbsp;<\/li>\n<\/ul>\n<\/li>\n<li><code>Get-SharingPolicy<br \/>  | Format-List Name, Domains, Enabled, Default<\/code><span><\/span>\n<ul>\n<li>  If results show (1) Enabled: True, and (2) the Domains property<br \/>  contains at least one rule with a CalendarSharingFreeBusy access level (Simple,<br \/>  Detail, or Reviewer), and (3) the targeted external organization is hosted in<br \/>  Microsoft 365, and (4) the policy is assigned to one or more mailboxes, your tenant is affected and in<br \/>  scope to migrate. Else,<br \/>  no action is needed.<\/li>\n<li>Note: rules that begin with<br \/>  Anonymous: represent calendar publishing to anonymous internet recipients via a<br \/>  published URL &#8211; these also appear in this output.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><i><u>What happens if I do nothing:<\/u><\/i><\/p>\n<p>Starting<br \/>  October 1, 2026, Exchange Web Services (EWS) will be gradually disabled in line<br \/>  with previous communications linked to this message. As this rollout reaches<br \/>  your tenant, cross-tenant Free\/Busy, MailTips, and Calendar Sharing that rely<br \/>  on EWS will be affected \u2014 recipients in partner organizations may no longer see<br \/>  Free\/Busy, MailTips, or shared calendars from your tenant.&nbsp;<\/p>\n<p>If your organization <b>is not<br \/>  ready to migrate<\/b>, you can retain EWS access by following the guidance of the<br \/>  latest blog we published: <a href=\"https:\/\/techcommunity.microsoft.com\/blog\/exchange\/exchange-online-ews-your-time-is-almost-up\/4492361\" target=\"_blank\">  ExchangeOnline EWS, Your Time is Almost Up<\/a> (<b><i>EWSEnabled<\/i><\/b><i>&nbsp;set to&nbsp;<b>True<\/b><\/i>)<br \/>  while you prepare and execute the migration steps attached to this message. EWS<br \/>  access through this extension will remain available until the final EWS<br \/>  shutdown on April 1, 2027.&nbsp;<\/p>\n<p>[Action Required\/Recommendations:]<\/p>\n<ul>\n<li><b>Follow this Message center post<\/b><br \/>  for updates to the rollout schedule. To avoid impact, <b>plan to migrate after<br \/>  the rollout reaches your tenant and before EWS deprecation<\/b>.<\/li>\n<li><b>Review the migration guide linked below<\/b> for<br \/>  step-by-step instructions to understand your current configurations, set up new<br \/>  Microsoft 365 Cross Tenant Access Policies, validate the new configurations,<br \/>  and remove unused configurations.&nbsp;<\/li>\n<li><b>Check the blog post linked below<\/b> for additional information and answers to frequently asked questions.&nbsp;<\/li>\n<li><b>Hybrid and on-premises scenarios are not in scope<\/b>.<br \/>  This update applies to fully cloud-hosted (Exchange Online \u2194 Exchange Online)<br \/>  cross-tenant and cross-cloud configurations only. For organizations running on-premises<br \/>  Exchange and Exchange Online in a Hybrid Deployment, migrate to <a href=\"https:\/\/learn.microsoft.com\/exchange\/hybrid-deployment\/deploy-dedicated-hybrid-app\" target=\"_blank\">  Dedicated Hybrid App<\/a>. For organizations hosted in Exchange Online sharing with<br \/>  another organization running Exchange on-premises, kindly monitor future<br \/>  Message Center posts for guidance on migration paths as they become available.&nbsp;<\/li>\n<\/ul>\n<p>[Additional information:]<\/p>\n<ul>\n<li><b>Migration guide:<\/b> <a href=\"https:\/\/learn.microsoft.com\/exchange\/sharing\/migrate-to-m365-xtap\" target=\"_blank\">  Migrating to Microsoft 365 Cross-Tenant Access Policy for sharing Free\/Busy, Calendars, and MailTips<\/a>.<\/li>\n<li><a href=\"https:\/\/learn.microsoft.com\/graph\/api\/resources\/m365-cross-tenant-access-policy-overview?view=graph-rest-1.0\" target=\"_blank\">Microsoft 365 Cross-Tenant Access Policy Microsoft Graph API Overview<\/a><\/li>\n<li><a href=\"https:\/\/techcommunity.microsoft.com\/blog\/exchange\/exchange-online-ews-your-time-is-almost-up\/4492361\" target=\"_blank\">Exchange Online EWS, Your Time is Almost Up<\/a><\/li>\n<li><a href=\"https:\/\/learn.microsoft.com\/exchange\/clients-and-mobile-in-exchange-online\/deprecation-of-ews-exchange-online\" target=\"_blank\">Deprecation of EWS in Exchange Online&nbsp;<\/a><\/li>\n<li><a href=\"https:\/\/www.microsoft.com\/en-us\/security\/blog\/2025\/07\/08\/enhancing-microsoft-365-security-by-eliminating-high-privilege-access\/\" target=\"_blank\">Enhancing Microsoft 365 security by eliminating high-privilege access<\/a>&nbsp;<\/li>\n<li><b>Blog Post:<\/b>&nbsp;<a href=\"https:\/\/techcommunity.microsoft.com\/blog\/exchange\/cross-tenant-freebusy-mailtips-and-calendar-sharing-are-moving-to-cross-tenant-a\/4545169\" target=\"_blank\">Cross-tenant Free\/Busy, MailTips, and Calendar Sharing are moving to Cross-Tenant   Access Policy<\/a><\/li>\n<\/ul>\n<\/td>\n<\/tr>\n<tr>\n<th>Machine Translation<\/th>\n<td>\n<p>2026\u5e748\u670825\u65e5\u66f4\u65b0:\u5185\u5bb9\u3068\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>[\u4f55\u3068\u306a\u305c:]<\/p>\n<p>Exchange Web Services(EWS)<br \/>  \u975e\u63a8\u5968\u5316\u306f <b>2026\u5e7410\u67081\u65e5\u304b\u3089<\/b>\u59cb\u307e\u308a\u307e\u3059\u3002\u30c6\u30ca\u30f3\u30c8\u9593\u30b3\u30e9\u30dc\u30ec\u30fc\u30b7\u30e7\u30f3\u6a5f\u80fd<br \/>  &#8211; \u30d5\u30ea\u30fc\/\u30d3\u30b8\u30fc\u3001MailTips\u3001\u30ab\u30ec\u30f3\u30c0\u30fc\u5171\u6709 &#8211; \u73fe\u5728\u306fEWS\u3092\u5229\u7528\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u30af\u30ed\u30b9\u30c6\u30ca\u30f3\u30c8 \u30d5\u30ea\u30fc\/\u30d3\u30b8\u30fc<br \/>  MailTips\u304a\u3088\u3073Microsoft 365\u306e\u30af\u30ed\u30b9\u30c6\u30ca\u30f3\u30c8\u30a2\u30af\u30bb\u30b9\u30dd\u30ea\u30b7\u30fc\u306b\u3088\u308b\u30ab\u30ec\u30f3\u30c0\u30fc\u5171\u6709\u3001<br \/>  \u3053\u308c\u306fEWS\u30d9\u30fc\u30b9\u306e\u30af\u30ed\u30b9\u30c6\u30ca\u30f3\u30c8\u5354\u50cd\u306b\u4ee3\u308f\u308b\u3082\u306e\u3067\u3001 <b>2026\u5e749\u6708<\/b>\u304b\u3089\u5229\u7528\u53ef\u80fd\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>[\u5c55\u958b\u30b9\u30b1\u30b8\u30e5\u30fc\u30eb:]<\/p>\n<ul>\n<li>\u4e16\u754c\u5c55\u958b:2026\u5e748\u6708\u306b\u5c55\u958b\u3092\u958b\u59cb\u3057\u30012026\u5e749\u670815\u65e5\u307e\u3067\u306b\u5b8c\u4e86\u3059\u308b\u4e88\u5b9a\u3067\u3059\u3002<\/li>\n<li>GCC:2026\u5e749\u6708\u521d\u65ec(\u4ee5\u524d\u306f8\u6708\u4e2d\u65ec)\u306b\u5c55\u958b\u3092\u958b\u59cb\u3057\u30012026\u5e749\u670830\u65e5(\u4ee5\u524d\u306f9\u6708\u4e2d\u65ec)\u307e\u3067\u306b\u5b8c\u4e86\u3059\u308b\u4e88\u5b9a\u3067\u3059\u3002<\/li>\n<li>GCC\u30cf\u30a4:2026\u5e749\u6708\u521d\u65ec\u304b\u3089\u5c55\u958b\u3092\u958b\u59cb\u3057\u30012026\u5e749\u670830\u65e5\u307e\u3067\u306b\u5b8c\u4e86\u3059\u308b\u4e88\u5b9a\u3067\u3059\u3002<\/li>\n<li>DoD:2026\u5e749\u6708\u521d\u65ec\u304b\u3089\u5c55\u958b\u3092\u958b\u59cb\u3057\u30012026\u5e7410\u670830\u65e5(\u4ee5\u524d\u306f9\u6708\u672b)\u307e\u3067\u306b\u5b8c\u4e86\u3059\u308b\u4e88\u5b9a\u3067\u3059\u3002<\/li>\n<\/ul>\n<p>[\u7d44\u7e54\u3078\u306e\u5f71\u97ff:]<\/p>\n<p>\u7121\u6599\/\u6df7\u96d1\u4e2d\u306e\u30ab\u30ec\u30f3\u30c0\u30fc\u3092\u5171\u6709\u3059\u308b\u3053\u3068\u3001<br \/>  \u307e\u305f\u3001\u5225\u306eMicrosoft 365\u3067MailTips(\u4f8b:\u4e0d\u5728\u30e1\u30c3\u30bb\u30fc\u30b8)\u3082\u5229\u7528\u3067\u304d\u307e\u3059<br \/>  \u7d44\u7e54\u95a2\u4fc2\u3092\u901a\u3058\u305f\u7d44\u7e54<br \/>  \u5171\u6709\u30dd\u30ea\u30b7\u30fc\u306fExchange Web Services(EWS)\u306b\u4f9d\u5b58\u3057\u3066\u304a\u308a\u3001<br \/>  \u5ec3\u6b62\u3055\u308c\u307e\u3057\u305f\u3002\u3053\u308c\u3089\u306e\u30c6\u30ca\u30f3\u30c8\u9593\u30b3\u30e9\u30dc\u30ec\u30fc\u30b7\u30e7\u30f3\u30b7\u30ca\u30ea\u30aa\u3092\u7dad\u6301\u3059\u308b\u305f\u3081\u306b\u3001<br \/>  Microsoft 365\u30af\u30ed\u30b9\u30c6\u30ca\u30f3\u30c8\u30a2\u30af\u30bb\u30b9\u30dd\u30ea\u30b7\u30fc\u3078\u306e\u79fb\u884c\u3092\u59cb\u3081\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u3082\u3057\u4f7f\u7528\u3057\u305f\u5834\u5408\u3001\u3042\u306a\u305f\u306e\u30c6\u30ca\u30f3\u30c8\u306f\u5f71\u97ff\u3092\u53d7\u3051\u307e\u3059<br \/>  \u4ee5\u4e0b\u306e\u3044\u305a\u308c\u304b\u306eExchange Online\u69cb\u6210:<\/p>\n<ul>\n<li><b>\u7d44\u7e54\u95a2\u4fc2<\/b> &#8211; \u5171\u6709 \u30d5\u30ea\u30fc\/\u30d3\u30b8\u30fc<br \/>  \u307e\u305f\u306f\u4ed6\u306eMicrosoft 365\u30c6\u30ca\u30f3\u30c8\u3068\u306eMailTips\u3082\u542b\u307e\u308c\u307e\u3059&nbsp;<\/li>\n<li><span><span><b>\u5171\u6709\u30dd\u30ea\u30b7\u30fc<\/b> &#8211; \u30ab\u30ec\u30f3\u30c0\u30fc\u5171\u6709<br \/>  \u5916\u90e8\u3067\u306f\u3001\u4ed6\u306eMicrosoft 365\u306e\u53d7\u4fe1\u8005\u306b\u62db\u5f85\u72b6\u3092\u9001\u308b\u3053\u3068\u3067\u884c\u308f\u308c\u307e\u3059<br \/>  \u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8URL\u3092\u901a\u3058\u3066\u533f\u540d\u30a2\u30af\u30bb\u30b9\u306e\u305f\u3081\u306b\u516c\u958b\u3055\u308c\u3066\u3044\u308b\u7d44\u7e54\u3084\u30ab\u30ec\u30f3\u30c0\u30fc<\/span><\/span><\/li>\n<\/ul>\n<p>\u3053\u308c\u3089\u306e\u30b3\u30de\u30f3\u30c9\u306fExchange Online\u3067\u5b9f\u884c\u3057\u3066\u304f\u3060\u3055\u3044<br \/>  \u30c6\u30ca\u30f3\u30c8\u304c\u5f71\u97ff\u3092\u53d7\u3051\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3059\u308b\u305f\u3081\u306ePowerShell:&nbsp;<\/p>\n<ul>\n<li><code>Get-OrganizationRelationship<br \/>  | Format-List Name, DomainNames, Enabled, FreeBusyAccessEnabled,<br \/>  FreeBusyAccessLevel, FreeBusyAccessScope, MailTipsAccessEnabled,<br \/>  MailTipsAccessLevel, MailTipsAccessScope<\/code><span><\/span>\n<ul>\n<li><span>\u7d50\u679c\u304c\u793a\u3055\u308c\u308c\u3070<br \/>  (1) Enabled: True\u3001\u304a\u3088\u3073 (2) FreeBusyAccessEnabled: True\u3001\u307e\u305f\u306f<br \/>  MailtipsAccessEnabled: True\u3001\u305d\u3057\u3066(3) \u5916\u90e8\u7d44\u7e54\u304c<br \/>  Microsoft 365\u3001\u3042\u306a\u305f\u306e\u30c6\u30ca\u30f3\u30c8\u306f\u5f71\u97ff\u3092\u53d7\u3051\u3066\u304a\u308a\u3001\u79fb\u884c\u306e\u5bfe\u8c61\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u305d\u308c\u4ee5\u5916\u306f\u3001\u4f55\u3082\u3067\u304d\u307e\u305b\u3093<br \/>  \u5fc5\u8981\u306a\u3053\u3068\u3067\u3059\u3002<\/span>&nbsp;<\/li>\n<\/ul>\n<\/li>\n<li><code>Get-SharingPolicy<br \/>  | Format-List Name, Domains, Enabled, Default<\/code><span><\/span>\n<ul>\n<li>\u7d50\u679c\u304c(1) Enabled: True\u3001(2) \u30c9\u30e1\u30a4\u30f3\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u793a\u3059\u5834\u5408<br \/>  \u5c11\u306a\u304f\u3068\u30821\u3064\u306e\u30eb\u30fc\u30eb\u306fCalendarSharingFreeBusy\u306e\u30a2\u30af\u30bb\u30b9\u30ec\u30d9\u30eb(Simple\u3001<br \/>  \u8a73\u7d30\u307e\u305f\u306f\u30ec\u30d3\u30e5\u30a2\u30fc)\u3001\u304a\u3088\u3073(3) \u5bfe\u8c61\u3068\u306a\u308b\u5916\u90e8\u7d44\u7e54\u304c\u30db\u30b9\u30c8\u3055\u308c\u3066\u3044\u308b<br \/>  Microsoft 365\u3001\u305d\u3057\u3066(4)\u30dd\u30ea\u30b7\u30fc\u304c1\u3064\u4ee5\u4e0a\u306e\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u306b\u5272\u308a\u5f53\u3066\u3089\u308c\u3001\u30c6\u30ca\u30f3\u30c8\u304c\u5f71\u97ff\u3092\u53d7\u3051\u3001<br \/>  \u79fb\u884c\u306e\u4f59\u6ce2\u3002\u3055\u3082\u306a\u3051\u308c\u3070\u3001<br \/>  \u4f55\u306e\u884c\u52d5\u3082\u5fc5\u8981\u3042\u308a\u307e\u305b\u3093\u3002<\/li>\n<li>\u6ce8\u610f:\u30eb\u30fc\u30eb\u306f<br \/>  \u533f\u540d:\u30ab\u30ec\u30f3\u30c0\u30fc\u306e\u516c\u958b\u3092\u533f\u540d\u306e\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u53d7\u4fe1\u8005\u306b\u4f1d\u3048\u308b<br \/>  \u516c\u958bURL\u306f\u3053\u306e\u51fa\u529b\u306b\u3082\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><i><u>\u4f55\u3082\u3057\u306a\u304b\u3063\u305f\u3089\u3069\u3046\u306a\u308b\u304b:<\/u><\/i><\/p>\n<p>\u958b\u59cb<br \/>  2026\u5e7410\u67081\u65e5\u3001Exchange Web Services(EWS)\u306f\u6bb5\u968e\u7684\u306b\u7121\u52b9\u5316\u3055\u308c\u307e\u3059<br \/>  \u3053\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u306b\u4ee5\u524d\u306e\u901a\u4fe1\u304c\u30ea\u30f3\u30af\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u5c55\u958b\u304c\u59cb\u307e\u308b\u306b\u3064\u308c\u3066<br \/>  \u3042\u306a\u305f\u306e\u30c6\u30ca\u30f3\u30c8\u3001\u30af\u30ed\u30b9\u30c6\u30ca\u30f3\u30c8\u306e\u30d5\u30ea\u30fc\/\u30d3\u30b8\u30fc\u3001MailTips\u3001\u30ab\u30ec\u30f3\u30c0\u30fc\u5171\u6709\u306a\u3069\u3001<br \/>  EWS\u306f\u5f71\u97ff\u3092\u53d7\u3051\u307e\u3059 &#8211; \u30d1\u30fc\u30c8\u30ca\u30fc\u7d44\u7e54\u306e\u53d7\u7d66\u8005\u306f\u3082\u306f\u3084\u898b\u3089\u308c\u306a\u304f\u306a\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093<br \/>  \u7121\u6599\u30fb\u6df7\u307f\u4e2d\u3001MailTips\u3001\u307e\u305f\u306f\u30c6\u30ca\u30f3\u30c8\u304b\u3089\u306e\u5171\u6709\u30ab\u30ec\u30f3\u30c0\u30fc\u3002&nbsp;<\/p>\n<p>\u3082\u3057\u3042\u306a\u305f\u306e\u7d44\u7e54<b>\u304c\u305d\u3046\u3067\u306a\u3044\u5834\u5408<br \/>  \u79fb\u884c\u306e\u6e96\u5099\u304c\u3067\u304d<\/b>\u305f\u3089\u3001\u4ee5\u4e0b\u306e\u30ac\u30a4\u30c0\u30f3\u30b9\u306b\u5f93\u3046\u3053\u3068\u3067EWS\u30a2\u30af\u30bb\u30b9\u3092\u4fdd\u6301\u3067\u304d\u307e\u3059\u3002<br \/>  \u6700\u65b0\u30d6\u30ed\u30b0:<a href=\"https:\/\/techcommunity.microsoft.com\/blog\/exchange\/exchange-online-ews-your-time-is-almost-up\/4492361\" target=\"_blank\">ExchangeOnline EWS\u3001\u3042\u306a\u305f\u306e\u6642\u9593\u306f\u3082\u3046\u3059\u3050\u7d42\u308f<\/a>\u308b(<b><i>EWSEnabled<\/i><\/b><i>&nbsp;\u304c<b>True<\/b>\u306b&nbsp;\u8a2d\u5b9a<\/i>)<br \/>  \u3053\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u306b\u4ed8\u968f\u3059\u308b\u79fb\u884c\u30b9\u30c6\u30c3\u30d7\u3092\u6e96\u5099\u3057\u5b9f\u884c\u3059\u308b\u9593\u306b\u3002EWS<br \/>  \u3053\u306e\u5ef6\u9577\u306b\u3088\u308b\u30a2\u30af\u30bb\u30b9\u306f\u6700\u7d42EWS\u307e\u3067\u5229\u7528\u53ef\u80fd\u3067\u3059<br \/>  2027\u5e744\u67081\u65e5\u306b\u9589\u9396\u3055\u308c\u307e\u3057\u305f\u3002&nbsp;<\/p>\n<p>[\u5fc5\u8981\u306a\u884c\u52d5\/\u63a8\u5968\u4e8b\u9805:]<\/p>\n<ul>\n<li><b>\u3053\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u30bb\u30f3\u30bf\u30fc\u306e\u6295\u7a3f\u3092\u30d5\u30a9\u30ed\u30fc\u3057\u3066\u304f\u3060\u3055\u3044<\/b><br \/>  \u5c55\u958b\u30b9\u30b1\u30b8\u30e5\u30fc\u30eb\u306e\u66f4\u65b0\u306b\u3064\u3044\u3066\u3002\u5f71\u97ff\u3092\u907f\u3051\u308b\u305f\u3081\u306b\u3001 <b>\u79fb\u884c\u5f8c\u306b\u79fb\u884c\u3092\u8a08\u753b\u3057\u3066\u304f\u3060\u3055\u3044<br \/>  \u30ed\u30fc\u30eb\u30a2\u30a6\u30c8\u306f\u30c6\u30ca\u30f3\u30c8\u306b\u5c4a\u304d\u3001EWS\u306e\u975e\u511f\u5374\u524d\u306b\u884c\u308f\u308c\u307e\u3059<\/b>\u3002<\/li>\n<li><b>\u4ee5\u4e0b\u306b\u30ea\u30f3\u30af\u3055\u308c\u3066\u3044\u308b\u79fb\u884c\u30ac\u30a4\u30c9\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044<\/b> \u3002<br \/>  \u73fe\u5728\u306e\u69cb\u6210\u3092\u7406\u89e3\u3057\u3001\u65b0\u3057\u3044\u8a2d\u5b9a\u3092\u3059\u308b\u305f\u3081\u306e\u30b9\u30c6\u30c3\u30d7\u30d0\u30a4\u30b9\u30c6\u30c3\u30d7\u306e\u624b\u9806<br \/>  Microsoft 365\u306e\u30af\u30ed\u30b9\u30c6\u30ca\u30f3\u30c8\u30a2\u30af\u30bb\u30b9\u30dd\u30ea\u30b7\u30fc\u3001\u65b0\u3057\u3044\u69cb\u6210\u306e\u691c\u8a3c\u3001<br \/>  \u672a\u4f7f\u7528\u306e\u8a2d\u5b9a\u3092\u524a\u9664\u3057\u307e\u3059\u3002&nbsp;<\/li>\n<li>\u8a73\u7d30\u60c5\u5831\u3084\u3088\u304f\u3042\u308b\u8cea\u554f\u3078\u306e\u56de\u7b54\u306b\u3064\u3044\u3066\u306f<b>\u3001\u4ee5\u4e0b\u306e\u30d6\u30ed\u30b0\u8a18\u4e8b\u3092\u3054\u89a7\u304f\u3060\u3055\u3044<\/b>\u3002&nbsp;<\/li>\n<li><b>\u30cf\u30a4\u30d6\u30ea\u30c3\u30c9\u3084\u30aa\u30f3\u30d7\u30ec\u30df\u30b9\u306e\u30b7\u30ca\u30ea\u30aa\u306f\u5bfe\u8c61\u5916<\/b>\u3067\u3059\u3002<br \/>  \u3053\u306e\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u306f\u5b8c\u5168\u30af\u30e9\u30a6\u30c9\u30db\u30b9\u30c6\u30a3\u30f3\u30b0(Exchange Online?)\u306b\u9069\u7528\u3055\u308c\u307e\u3059\u3002Exchange Online)<br \/>  \u30af\u30ed\u30b9\u30c6\u30ca\u30f3\u30c8\u304a\u3088\u3073\u30af\u30ed\u30b9\u30af\u30e9\u30a6\u30c9\u69cb\u6210\u306e\u307f\u3002\u30aa\u30f3\u30d7\u30ec\u30df\u30b9\u3067\u904b\u7528\u3059\u308b\u7d44\u7e54\u5411\u3051<br \/>  Exchange\u304a\u3088\u3073Exchange Online\u306e\u30cf\u30a4\u30d6\u30ea\u30c3\u30c9\u5c55\u958b\u3067\u306f\u3001 <a href=\"https:\/\/learn.microsoft.com\/exchange\/hybrid-deployment\/deploy-dedicated-hybrid-app\" target=\"_blank\">  \u5c02\u7528\u30cf\u30a4\u30d6\u30ea\u30c3\u30c9\u30a2\u30d7\u30ea<\/a>\u306b\u79fb\u884c\u3057\u3066\u304f\u3060\u3055\u3044\u3002Exchange Online\u3067\u30db\u30b9\u30c8\u3055\u308c\u3066\u3044\u308b\u7d44\u7e54\u306e\u5834\u5408\u3001<br \/>  \u5225\u306e\u7d44\u7e54\u306fExchange\u30aa\u30f3\u30d7\u30ec\u30df\u30b9\u3092\u904b\u7528\u3057\u3066\u304a\u308a\u3001\u4eca\u5f8c\u306e\u69d8\u5b50\u3092\u3054\u5b58\u77e5\u304f\u3060\u3055\u3044<br \/>  \u30e1\u30c3\u30bb\u30fc\u30b8\u30bb\u30f3\u30bf\u30fc\u3067\u306f\u3001\u79fb\u884c\u7d4c\u8def\u306b\u95a2\u3059\u308b\u30ac\u30a4\u30c0\u30f3\u30b9\u304c\u516c\u958b\u3055\u308c\u6b21\u7b2c\u3001\u60c5\u5831\u3092\u63b2\u8f09\u3057\u3066\u3044\u307e\u3059\u3002&nbsp;<\/li>\n<\/ul>\n<p>[\u8ffd\u52a0\u60c5\u5831:]<\/p>\n<ul>\n<li><b>\u79fb\u884c\u30ac\u30a4\u30c9:<\/b><a href=\"https:\/\/learn.microsoft.com\/exchange\/sharing\/migrate-to-m365-xtap\" target=\"_blank\">\u7121\u6599\/\u6df7\u307f\u4e2d\u3001\u30ab\u30ec\u30f3\u30c0\u30fc\u3001MailTips\u306e\u5171\u6709\u306e\u305f\u3081\u306eMicrosoft 365\u30af\u30ed\u30b9\u30c6\u30ca\u30f3\u30c8\u30a2\u30af\u30bb\u30b9\u30dd\u30ea\u30b7\u30fc\u3078\u306e\u79fb\u884c<\/a>\u3002<\/li>\n<li><a href=\"https:\/\/learn.microsoft.com\/graph\/api\/resources\/m365-cross-tenant-access-policy-overview?view=graph-rest-1.0\" target=\"_blank\">Microsoft 365 \u30af\u30ed\u30b9\u30c6\u30ca\u30f3\u30c8\u30a2\u30af\u30bb\u30b9\u30dd\u30ea\u30b7\u30fc Microsoft Graph API \u6982\u8981<\/a><\/li>\n<li><a href=\"https:\/\/techcommunity.microsoft.com\/blog\/exchange\/exchange-online-ews-your-time-is-almost-up\/4492361\" target=\"_blank\">\u30aa\u30f3\u30e9\u30a4\u30f3\u3067\u4ea4\u63db\u3059\u308bEWS\u3001\u3042\u306a\u305f\u306e\u6642\u9593\u306f\u3082\u3046\u3059\u3050\u7d42\u308f\u308a\u307e\u3059<\/a><\/li>\n<li><a href=\"https:\/\/learn.microsoft.com\/exchange\/clients-and-mobile-in-exchange-online\/deprecation-of-ews-exchange-online\" target=\"_blank\">Exchange Online&nbsp;\u306b\u304a\u3051\u308bEWS\u306e\u975e\u63a8\u5968\u5316<\/a><\/li>\n<li>\u9ad8\u6a29\u9650\u30a2\u30af\u30bb\u30b9&nbsp;\u3092<a href=\"https:\/\/www.microsoft.com\/en-us\/security\/blog\/2025\/07\/08\/enhancing-microsoft-365-security-by-eliminating-high-privilege-access\/\" target=\"_blank\">\u6392\u9664\u3059\u308b\u3053\u3068\u3067Microsoft 365\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5f37\u5316\u3059\u308b<\/a><\/li>\n<li><b>\u30d6\u30ed\u30b0\u8a18\u4e8b:<\/b>&nbsp;<a href=\"https:\/\/techcommunity.microsoft.com\/blog\/exchange\/cross-tenant-freebusy-mailtips-and-calendar-sharing-are-moving-to-cross-tenant-a\/4545169\" target=\"_blank\">\u30af\u30ed\u30b9\u30c6\u30ca\u30f3\u30c8\u30d5\u30ea\u30fc\/\u30d3\u30b8\u30fc\u3001MailTips\u3001\u30ab\u30ec\u30f3\u30c0\u30fc\u5171\u6709\u304c\u30af\u30ed\u30b9\u30c6\u30ca\u30f3\u30c8\u30a2\u30af\u30bb\u30b9\u30dd\u30ea\u30b7\u30fc\u306b\u79fb\u884c\u4e2d<\/a><\/li>\n<\/ul>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>MC1446796 | (Updated) Migrate Free\/Busy, MailTips, and Calendar Sharing before EWS deprecation Classification  [&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-18072","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/18072","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=18072"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/18072\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=18072"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=18072"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=18072"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}