{"id":26329,"date":"2026-09-17T10:13:33","date_gmt":"2026-09-17T10:13:33","guid":{"rendered":"https:\/\/windowsreport.com\/fr\/microsoft-avertit-une-nouvelle-fois-les-administrateurs-exchange-online-avant-le-debut-de-la-mise-hors-service-dews\/"},"modified":"2026-09-17T10:13:33","modified_gmt":"2026-09-17T10:13:33","slug":"microsoft-avertit-une-nouvelle-fois-les-administrateurs-exchange-online-avant-le-debut-de-la-mise-hors-service-dews","status":"publish","type":"post","link":"https:\/\/windowsreport.com\/fr\/microsoft-avertit-une-nouvelle-fois-les-administrateurs-exchange-online-avant-le-debut-de-la-mise-hors-service-dews\/","title":{"rendered":"Microsoft avertit une nouvelle fois les administrateurs Exchange Online avant le d\u00e9but de la mise hors service d\u2019EWS"},"content":{"rendered":"\n<p>Microsoft a \u00e9mis un nouvel avertissement \u00e0 l\u2019intention des administrateurs Exchange Online \u00e0 l\u2019approche d\u2019un changement majeur concernant Exchange Web Services. L\u2019<a href=\"https:\/\/devblogs.microsoft.com\/microsoft365dev\/retirement-of-exchange-web-services-in-exchange-online\/\" target=\"_blank\" rel=\"noreferrer noopener\">avertissement initial remonte \u00e0 2023<\/a>, mais l\u2019entreprise avait \u00e9galement alert\u00e9 les administrateurs plus t\u00f4t cette ann\u00e9e. Si vous l\u2019ignorez, le retrait d\u2019EWS d\u00e9butera le 1er octobre 2026, et Microsoft a introduit un nouveau param\u00e8tre <em>EWSAllowedAppIDs<\/em> qui permet aux organisations de contr\u00f4ler les applications qui peuvent continuer \u00e0 utiliser le service.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-exchange-online-ews-access-retirement-begins-october-1\">Le retrait de l\u2019acc\u00e8s EWS d\u2019Exchange Online d\u00e9bute le 1er octobre<\/h2>\n\n\n\n<p>Microsoft pr\u00e9pare ses clients au retrait d\u2019EWS depuis plusieurs ann\u00e9es, mais la prochaine phase est d\u00e9sormais proche. \u00c0 compter du 1er octobre, Exchange Online commencera \u00e0 appliquer ce retrait, et le retrait complet d\u2019EWS devrait s\u2019achever d\u2019ici le 1er avril 2027.<\/p>\n\n\n\n<p>Cet avertissement est utile aux organisations qui disposent encore d\u2019applications ou de services reposant sur EWS. Microsoft indique que <em>EWSAllowedAppIDs<\/em> fournit une liste d\u2019autorisation au niveau du locataire dans laquelle les administrateurs peuvent sp\u00e9cifier les ID d\u2019application qui doivent continuer \u00e0 avoir acc\u00e8s \u00e0 EWS pendant la transition.<\/p>\n\n\n\n<p>Le changement important concerne la mani\u00e8re dont <em>EWSEnabled<\/em> se comportera une fois la mise en application commenc\u00e9e. Microsoft indique qu\u2019avant octobre, d\u00e9finir <em>EWSEnabled<\/em> sur <em>True<\/em> sans liste d\u2019autorisation autorise le trafic EWS. \u00c0 partir d\u2019octobre, cette configuration n\u2019offrira plus d\u2019acc\u00e8s illimit\u00e9. Les applications approuv\u00e9es doivent \u00eatre identifi\u00e9es via la liste d\u2019autorisation des ID d\u2019application. Dans un message du centre d\u2019administration, Microsoft a confirm\u00e9 que lorsque <em>EWSEnabled<\/em> est activ\u00e9, les administrateurs peuvent utiliser <em>EWSAllowedAppIDs<\/em> pour sp\u00e9cifier les ID d\u2019application autoris\u00e9s \u00e0 acc\u00e9der \u00e0 EWS.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-admins-need-to-check-their-ews-dependencies-now\">Les administrateurs doivent v\u00e9rifier d\u00e8s maintenant leurs d\u00e9pendances \u00e0 EWS<\/h2>\n\n\n\n<p>Microsoft <a href=\"https:\/\/admin.microsoft.com\/#\/MessageCenter\/:\/messages\/MC1447678\" target=\"_blank\" rel=\"noreferrer noopener\">recommande<\/a> aux organisations d\u2019identifier d\u2019abord les applications qui utilisent encore EWS, puis de cr\u00e9er et de valider une liste d\u2019autorisation contenant les applications qui ont besoin d\u2019un acc\u00e8s continu. L\u2019entreprise indique que les modifications apport\u00e9es \u00e0 la configuration <em>EWSAllowedAppIDs<\/em> peuvent n\u00e9cessiter jusqu\u2019\u00e0 24 heures pour prendre effet. Les administrateurs ne doivent donc pas remettre ce travail \u00e0 la derni\u00e8re minute.<\/p>\n\n\n\n<p>Microsoft a \u00e9galement publi\u00e9 en septembre des recommandations suppl\u00e9mentaires invitant sp\u00e9cifiquement les administrateurs \u00e0 prendre le contr\u00f4le de leur configuration <em>EWSAllowedAppIDs<\/em> avant le d\u00e9but des changements d\u2019acc\u00e8s. Pour les organisations qui ont d\u00e9j\u00e0 configur\u00e9 <em>EWSEnabled=True<\/em> et une liste d\u2019autorisation des ID d\u2019application, Microsoft indique que ce param\u00e8tre ne sera pas modifi\u00e9 avant avril 2027.<\/p>\n\n\n\n<p>Pour l\u2019instant, les administrateurs Exchange Online doivent recenser leur utilisation d\u2019EWS, identifier les applications qui en d\u00e9pendent encore et s\u2019assurer que les ID d\u2019application requis sont inclus avant le 1er octobre.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Microsoft a \u00e9mis un nouvel avertissement \u00e0 l\u2019intention des administrateurs Exchange Online \u00e0 l\u2019approche d\u2019un changement majeur concernant Exchange Web Services. L\u2019avertissement initial remonte \u00e0 2023, mais l\u2019entreprise avait \u00e9galement alert\u00e9 les administrateurs plus t\u00f4t cette ann\u00e9e. Si vous l\u2019ignorez, le retrait d\u2019EWS d\u00e9butera le 1er octobre 2026, et Microsoft a introduit un nouveau param\u00e8tre [&hellip;]<\/p>\n","protected":false},"author":2314,"featured_media":26330,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_enabled_clarity":"","footnotes":""},"categories":[1019],"tags":[],"work":[],"class_list":["post-26329","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tutoriels"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.3 (Yoast SEO v28.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Microsoft avertit une nouvelle fois les administrateurs Exchange Online avant le d\u00e9but de la mise hors service d\u2019EWS<\/title>\n<meta name=\"description\" content=\"Microsoft avertit les administrateurs Exchange Online que la mise hors service d\u2019EWS commence le 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