{"id":11108,"date":"2025-04-19T04:00:52","date_gmt":"2025-04-18T19:00:52","guid":{"rendered":"https:\/\/m365jp.net\/?p=11108"},"modified":"2025-04-19T04:01:51","modified_gmt":"2025-04-18T19:01:51","slug":"mc676299-updated-retirement-of-exchange-web-services-in-exchange-online","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2025-04-19-mc676299-updated-retirement-of-exchange-web-services-in-exchange-online","title":{"rendered":"MC676299 | (Updated) Retirement of Exchange Web Services in Exchange Online"},"content":{"rendered":"
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MC676299 | (Updated) Retirement of Exchange Web Services in Exchange Online<\/th>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n\n\n\n\n\n\n\n\n
Classification<\/th>\nplanForChange<\/td>\n<\/tr>\n
Last Updated<\/th>\n04\/18\/2025 18:33:52<\/td>\n<\/tr>\n
Start Time<\/th>\n09\/21\/2023 22:24:31<\/td>\n<\/tr>\n
End Time<\/th>\n12\/31\/2026 08:00:00<\/td>\n<\/tr>\n
Message Content<\/th>\n\n

Updated April 18, 2025: We have updated the content. Thank you for your patience.<\/p>\n

In 2018, we announced<\/a> that we were no longer making feature updates to Exchange Web Services (EWS) in Exchange Online, and we advised developers to move to Microsoft Graph. <\/p>\n

In September 2023, we announced that on October 1, 2026, we will start blocking EWS requests to Exchange Online. <\/p>\n

<\/p>\n

We are now less than 18 months from October 1, 2026. We have made progress on closing several parity gaps with more changes in development to be released in the coming quarters. Please refer to Deprecation of Exchange Web Services in Exchange Online<\/a> for up-to-date guidance and roadmap information.  <\/p>\n

If you haven’t already, start the process of working with your application development organization and your application vendors to migrate active EWS applications on your tenant to the Graph API. <\/p>\n

<\/p>\n

[When this will happen:]<\/p>\n

October 1, 2026<\/p>\n

[How this affects your organization:]<\/p>\n

While the EWS components of the service will continue to receive security updates and certain non-security updates, product design and features will remain unchanged. This change also applies to the EWS SDKs for Java and .NET, as well. <\/p>\n

Despite this announcement, EWS is still available and supported for use in production environments. But we strongly suggest migrating to Microsoft Graph to access Exchange Online data and gain access to the latest features and functionality. <\/p>\n

Today\u2019s update and the retirement of EWS apply only to Microsoft 365 and Exchange Online (all environments); there are no changes to EWS in Exchange Server. Further, the changes in Exchange Online do not affect Outlook for Windows or Mac, Teams, or any other Microsoft product.<\/p>\n

In our original blog post, we said this change would affect only third-party (non-Microsoft) applications. We have expanded our effort and are now also removing EWS dependencies from Microsoft apps and services, and we\u2019re going to complete that work well before October 2026<\/b>. We intend to do this as quickly as possible without affecting the quality of service or product. <\/p>\n

There may be applications running on your tenant created by your organization or 3rd parties that use EWS. We recommend reviewing your application portfolio<\/a> now <\/b>to get an understanding of which apps need to be updated by your organization and which applications require updates from vendors.<\/p>\n

It is important to get started with this effort as soon as possible as the Graph API patterns are quite different from EWS. Equivalent Graph API operations may exhibit subtle differences that affect your use cases and application designs in unanticipated ways.<\/p>\n

Migrating Applications to Microsoft Graph <\/p>\n

We know there are several feature gaps between EWS and Microsoft Graph, and though the list below is not exhaustive, these are the gaps most frequently reported to us by developers: <\/p>\n

Machine Translation<\/th>\n\n

2025\u5e744\u670818\u65e5\u66f4\u65b0:\u30b3\u30f3\u30c6\u30f3\u30c4\u3092\u66f4\u65b0\u3057\u307e\u3057\u305f\u3002\u3054\u7406\u89e3\u3044\u305f\u3060\u304d\u3042\u308a\u304c\u3068\u3046\u3054\u3056\u3044\u307e\u3059\u3002<\/p>\n

2018 \u5e74\u306b\u3001Exchange Online \u306e Exchange Web \u30b5`\u30d3\u30b9 (EWS) \u306eC\u80fd\u66f4\u65b0\u3092\u884c\u308f\u306a\u3044 \u3053\u3068\u3092k\u8868<\/a> \u3057\u3001_k\u8005\u306b Microsoft Graph \u306b\u79fb\u884c\u3059\u308b\u3088\u3046\u306b\u30a2\u30c9\u30d0\u30a4\u30b9\u3057\u307e\u3057\u305f\u3002 <\/p>\n

2023 \u5e74 9 \u6708\u306b\u30012026 \u5e74 10 \u6708 1 \u65e5\u304b\u3089 Exchange Online \u3078\u306e EWS \u8981\u6c42\u306e\u30d6\u30ed\u30c3\u30af\u3092_\u59cb\u3059\u308b\u3053\u3068\u3092k\u8868\u3057\u307e\u3057\u305f\u3002<\/p>\n

<\/p>\n

2026\u5e7410\u67081\u65e5\u304b\u308918\u304b\u6708\u3092\u5207\u308a\u307e\u3057\u305f\u3002\u79c1\u305f\u3061\u306f\u3001\u3044\u304f\u3064\u304b\u306e\u30d1\u30ea\u30c6\u30a3\u30ae\u30e3\u30c3\u30d7\u306e\u89e3\u6d88\u306b\u5411\u3051\u3066\u524dM\u3057\u3066\u304a\u308a\u3001\u4eca\u5f8c\u6570\u56db\u534a\u671f\u306b\u30ea\u30ea`\u30b9\u3055\u308c\u308b_k\u306e\u6d93\u988f\u4e39\u6901\u8bc9M\u3081\u3066\u3044\u307e\u3059\u3002\u6700\u65b0\u306e\u30ac\u30a4\u30c0\u30f3\u30b9\u3068\u30ed`\u30c9\u30de\u30c3\u30d7\u60c5\u87ad\u6454\u819c\u3044\u76ae\u7a00 Exchange Online \u3067\u306e Exchange Web \u30b5`\u30d3\u30b9\u306e\u6b62<\/a> \u300d\u3092\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002  <\/p>\n

\u307e\u3060\u884c\u3063\u3066\u3044\u306a\u3044\u9f8a\u6089\u7a00\u6293\u8f9a\u66b4`\u30b7\u30e7\u30f3_kM\u304a\u3088\u3073\u30a2\u30d7\u30ea\u30b1`\u30b7\u30e7\u30f3 \u30d9\u30f3\u30c0`\u3068f\u529b\u3057\u3066\u3001\u30c6\u30ca\u30f3\u30c8\u4e0a\u306e\u30a2\u30af\u30c6\u30a3\u30d6\u306a EWS \u30a2\u30d7\u30ea\u30b1`\u30b7\u30e7\u30f3\u3092 Graph API \u306b\u79fb\u884c\u3059\u308b\u30d7\u30ed\u30bb\u30b9\u3092_\u59cb\u3057\u307e\u3059\u3002 <\/p>\n

<\/p>\n

[\u3053\u308c\u304c\u3044\u3064\u8d77\u3053\u308b\u304b:]<\/p>\n

2026\u5e7410\u67081\u65e5<\/p>\n

[\u3053\u308c\u304c\u3042\u306a\u305f\u306eM\u306b\u4e0e\u3048\u308b\u5f71:]<\/p>\n

\u30b5`\u30d3\u30b9\u306e EWS \u30b3\u30f3\u30dd`\u30cd\u30f3\u30c8\u306f\u5f15\u304dA\u304d\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u66f4\u65b0\u30d7\u30ed\u30b0\u30e9\u30e0\u3068\u7279\u5b9a\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u4ee5\u5916\u306e\u66f4\u65b0\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u53d7\u3051\u53d6\u308a\u307e\u3059\u304c\u3001u\u54c1\u306e\u30c7\u30b6\u30a4\u30f3\u3068C\u80fd\u306f\u6d93\u4e39\u6b37\u84fc\u62a4\u87c6\uffe5\u957f\u6d93\u7a00Java \u3068 .NET \u306e EWS SDK \u306b\u3082m\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n

\u3053\u306ek\u8868\u306b\u3082\u304b\u304b\u308f\u3089\u305a\u3001EWS \u306f\u5f15\u304dA\u304d\u5229\u7528\u53ef\u80fd\u3067\u3001\\\u7528h\u5883\u3067\u306e\u4f7f\u7528\u304c\u30b5\u30dd`\u30c8\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u305f\u3060\u3057\u3001Exchange Online \u30c7`\u30bf\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3001\u6700\u65b0\u306eC\u80fd\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u306b\u306f\u3001Microsoft Graph \u306b\u79fb\u884c\u3059\u308b\u3053\u3068\u3092\u304f\u304a\u5e5b\u5e5b\u7b4f\u84fc\u57c2<\/p>\n

\u672c\u65e5\u306e\u66f4\u65b0\u30d7\u30ed\u30b0\u30e9\u30e0\u3068 EWS \u306e\u6b62\u306f\u3001Microsoft 365 \u3068 Exchange Online (\u3059\u3079\u3066\u306eh\u5883) \u306b\u306e\u307fm\u7528\u3055\u308c\u307e\u3059\u3002Exchange Server \u306e EWS \u306b\u6d93\u6089\u8f98\u84fc\u62a4\u87c6\uffe5\u4e39\u6901\u6055Exchange Online\u306e\u6d93\u7a00Windows\u307e\u305f\u306fMac\u3001Teams\u3001\u307e\u305f\u306f\u305d\u306e\u4ed6\u306eMicrosoftu\u54c1\u7528\u306eOutlook\u306b\u306f\u5f71\u3057\u307e\u305b\u3093\u3002<\/p>\n

\u5143\u306e\u30d6\u30ed\u30b0\u4e8b\u3067\u306f\u3001\u3053\u306e\u6d93\u819d\u65e6`\u30c9\u30d1`\u30c6\u30a3 (Microsoft \u4ee5\u5916) \u306e\u30a2\u30d7\u30ea\u30b1`\u30b7\u30e7\u30f3\u306b\u306e\u307f\u5f71\u3059\u308b\u3068\u8ff0\u3079\u307e\u3057\u305f\u3002 \u79c1\u305f\u3061\u306f\u53d6\u308aM\u307f\u3092\u5927\u3057\u3001F\u5728\u3001Microsoft \u306e\u30a2\u30d7\u30ea\u3084\u30b5`\u30d3\u30b9\u304b\u3089 EWS \u306e\u4f9d\u5b58vS\u3082\u524a\u9664\u3057\u3066\u304a\u308a\u3001\u305d\u306e\u4f5cI\u306f 2026 \u5e74 10 \u6708\u307e\u3067\u306b\u5b8c\u4e86\u3059\u308b\u4e88\u5b9a\u3067\u3059<\/b>\u3002\u3053\u308c\u306f\u3001\u30b5`\u30d3\u30b9\u3084u\u54c1\u306e\u54c1|\u306b\u5f71\u3092\u4e0e\u3048\u308b\u3053\u3068\u306a\u304f\u3001\u3067\u304d\u308b\u3060\u3051\u65e9\u304f\u884c\u3046\u4e88\u5b9a\u3067\u3059\u3002 <\/p>\n

\u30c6\u30ca\u30f3\u30c8\u3067g\u884c\u3055\u308c\u3066\u3044\u308b\u30a2\u30d7\u30ea\u30b1`\u30b7\u30e7\u30f3\u306f\u3001M\u307e\u305f\u306f EWS \u3092\u4f7f\u7528\u3059\u308b\u30b5`\u30c9 \u30d1`\u30c6\u30a3\u306b\u3088\u3063\u3066\u4f5c\u6210\u3055\u308c\u3066\u3044\u308b\u9f8a\u6089\u8f98\u84fc\u57c2\u4eca\u3059\u3050\u30a2\u30d7\u30ea\u30b1`\u30b7\u30e7\u30f3 \u30dd`\u30c8\u30d5\u30a9\u30ea\u30aa\u3092_J\u3057\u3066<\/a><\/b>\u3001M\u304c\u66f4\u65b0\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u30a2\u30d7\u30ea\u3068\u30d9\u30f3\u30c0`\u304b\u3089\u306e\u66f4\u65b0\u304c\u5fc5\u8981\u306a\u30a2\u30d7\u30ea\u30b1`\u30b7\u30e7\u30f3\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3092\u304a\u5e5b\u5e5b\u7b4f\u84fc\u57c2<\/p>\n

Graph API \u30d1\u30bf`\u30f3\u306f EWS \u3068\u306f\u304b\u306a\u308a\u306a\u308b\u305f\u3081\u3001\u3053\u306e\u53d6\u308aM\u307f\u3092\u3067\u304d\u308b\u3060\u3051\u65e9\u304f_\u59cb\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u540c\u7b49\u306e Graph API \u64cd\u4f5c\u3067\u306f\u3001\u4e88\u671f\u3057\u306a\u3044\u65b9\u6cd5\u3067\u30e6`\u30b9\u30b1`\u30b9\u3084\u30a2\u30d7\u30ea\u30b1`\u30b7\u30e7\u30f3O\u306b\u5f71\u3092\u4e0e\u3048\u308b\u5fae\u5999\u306a`\u3044\u304c\u3089\u308c\u308b\u9f8a\u6089\u8f98\u84fc\u57c2<\/p>\n

Microsoft Graph \u3078\u306e\u30a2\u30d7\u30ea\u30b1`\u30b7\u30e7\u30f3\u306e\u79fb\u884c<\/p>\n

EWS \u3068 Microsoft Graph \u306eg\u306b\u306f\u3044\u304f\u3064\u304b\u306eC\u80fd\u306e\u30ae\u30e3\u30c3\u30d7\u304c\u3042\u308b\u3053\u3068\u306f\u308f\u304b\u3063\u3066\u3044\u307e\u3059\u304c\u3001\u4ee5\u4e0b\u306e\u30ea\u30b9\u30c8\u306f\u3059\u3079\u3066\u3092W_\u3057\u3066\u3044\u308b\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001_k\u8005\u304b\u3089\u6700\u3082l\u7e41\u306b\u87fe\u599e\u4e39\u6b37\u6bf3\u60ad\u6c13\u9a7b\u6d17\u97e6\u97e6\u8da3\u8f98\u6266\u57c2 <\/p>\n