{"id":6046,"date":"2026-09-17T11:28:15","date_gmt":"2026-09-17T11:28:15","guid":{"rendered":"https:\/\/windowsreport.com\/de\/microsoft-warnt-exchange-online-administratoren-erneut-vor-dem-beginn-der-ews-einstellung\/"},"modified":"2026-09-17T11:28:15","modified_gmt":"2026-09-17T11:28:15","slug":"microsoft-warnt-exchange-online-administratoren-erneut-vor-dem-beginn-der-ews-einstellung","status":"publish","type":"post","link":"https:\/\/windowsreport.com\/de\/microsoft-warnt-exchange-online-administratoren-erneut-vor-dem-beginn-der-ews-einstellung\/","title":{"rendered":"Microsoft warnt Exchange-Online-Administratoren erneut vor dem Beginn der EWS-Einstellung"},"content":{"rendered":"\n<p>Microsoft hat Exchange-Online-Administratoren im Vorfeld einer wichtigen \u00c4nderung an Exchange Web Services erneut gewarnt. Die <a href=\"https:\/\/devblogs.microsoft.com\/microsoft365dev\/retirement-of-exchange-web-services-in-exchange-online\/\" target=\"_blank\" rel=\"noreferrer noopener\">erste Warnung erfolgte 2023<\/a>, allerdings hat das Unternehmen Administratoren auch bereits Anfang dieses Jahres davor gewarnt. Falls Sie es noch nicht wissen: Die Abschaltung von EWS beginnt am 1. Oktober 2026, und Microsoft hat eine neue Einstellung <em>EWSAllowedAppIDs<\/em> eingef\u00fchrt, mit der Organisationen steuern k\u00f6nnen, welche Anwendungen den Dienst weiterhin nutzen d\u00fcrfen.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-exchange-online-ews-access-retirement-begins-october-1\">Abschaltung des EWS-Zugriffs in Exchange Online beginnt am 1. Oktober<\/h2>\n\n\n\n<p>Microsoft bereitet Kunden seit mehreren Jahren auf die Abschaltung von EWS vor, aber die n\u00e4chste Phase steht nun kurz bevor. Ab dem 1. Oktober beginnt Exchange Online damit, die Abschaltung durchzusetzen; die vollst\u00e4ndige Abschaltung von EWS soll bis zum 1. April 2027 abgeschlossen sein.<\/p>\n\n\n\n<p>Die Warnung ist hilfreich f\u00fcr Organisationen, die noch Anwendungen oder Dienste nutzen, die von EWS abh\u00e4ngen. Laut Microsoft bietet <em>EWSAllowedAppIDs<\/em> eine Zulassungsliste auf Mandantenebene, in der Administratoren die App-IDs angeben k\u00f6nnen, die w\u00e4hrend der \u00dcbergangsphase weiterhin Zugriff auf EWS haben sollen.<\/p>\n\n\n\n<p>Die wichtige \u00c4nderung betrifft das Verhalten von <em>EWSEnabled<\/em>, sobald die Durchsetzung beginnt. Laut Microsoft l\u00e4sst die Konfiguration <em>EWSEnabled<\/em>=True vor Oktober ohne Zulassungsliste EWS-Datenverkehr zu. Ab Oktober gew\u00e4hrt diese Konfiguration keinen uneingeschr\u00e4nkten Zugriff mehr. Zugelassene Anwendungen m\u00fcssen \u00fcber die App-ID-Zulassungsliste identifiziert werden. In einer Admin-Center-Meldung best\u00e4tigte Microsoft, dass Administratoren bei aktiviertem <em>EWSEnabled<\/em> \u00fcber <em>EWSAllowedAppIDs<\/em> festlegen k\u00f6nnen, welche App-IDs auf EWS zugreifen d\u00fcrfen.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-admins-need-to-check-their-ews-dependencies-now\">Administratoren m\u00fcssen jetzt ihre EWS-Abh\u00e4ngigkeiten pr\u00fcfen<\/h2>\n\n\n\n<p>Microsoft <a href=\"https:\/\/admin.microsoft.com\/#\/MessageCenter\/:\/messages\/MC1447678\" target=\"_blank\" rel=\"noreferrer noopener\">empfiehlt<\/a>, dass Organisationen zun\u00e4chst Anwendungen identifizieren, die EWS noch verwenden, und anschlie\u00dfend eine Zulassungsliste erstellen und validieren, die die Anwendungen enth\u00e4lt, die weiterhin Zugriff ben\u00f6tigen. Das Unternehmen gibt an, dass es bis zu 24 Stunden dauern kann, bis \u00c4nderungen an der <em>EWSAllowedAppIDs<\/em>-Konfiguration wirksam werden. Administratoren sollten diese Arbeit daher nicht bis zur letzten Minute aufschieben.<\/p>\n\n\n\n<p>Microsoft hat im September au\u00dferdem zus\u00e4tzliche Hinweise ver\u00f6ffentlicht, in denen Administratoren ausdr\u00fccklich dazu aufgefordert werden, die Kontrolle \u00fcber ihre <em>EWSAllowedAppIDs<\/em>-Konfiguration zu \u00fcbernehmen, bevor die Zugriffs\u00e4nderungen beginnen. F\u00fcr Organisationen, die bereits <em>EWSEnabled<\/em>=True und eine App-ID-Zulassungsliste konfiguriert haben, wird die Einstellung laut Microsoft vor April 2027 nicht ge\u00e4ndert.<\/p>\n\n\n\n<p>Vorerst sollten Exchange-Online-Administratoren ihre EWS-Nutzung erfassen, Anwendungen identifizieren, die noch davon abh\u00e4ngen, und sicherstellen, dass die erforderlichen App-IDs vor dem 1. Oktober enthalten sind.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Microsoft hat Exchange-Online-Administratoren im Vorfeld einer wichtigen \u00c4nderung an Exchange Web Services erneut gewarnt. Die erste Warnung erfolgte 2023, allerdings hat das Unternehmen Administratoren auch bereits Anfang dieses Jahres davor gewarnt. Falls Sie es noch nicht wissen: Die Abschaltung von EWS beginnt am 1. Oktober 2026, und Microsoft hat eine neue Einstellung EWSAllowedAppIDs eingef\u00fchrt, mit [&hellip;]<\/p>\n","protected":false},"author":2314,"featured_media":6047,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_enabled_clarity":"","footnotes":""},"categories":[1797],"tags":[],"work":[],"class_list":["post-6046","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-anleitung"],"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 warnt Exchange-Online-Administratoren erneut vor dem Beginn der EWS-Einstellung<\/title>\n<meta name=\"description\" content=\"Microsoft warnt Exchange-Online-Administratoren, dass die Einstellung von EWS am 1. 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