{"id":5212,"date":"2026-08-12T08:44:45","date_gmt":"2026-08-12T08:44:45","guid":{"rendered":"https:\/\/windowsreport.com\/de\/owa-light-ist-nach-microsofts-august-exchange-update-endgultig-verschwunden\/"},"modified":"2026-08-12T08:44:45","modified_gmt":"2026-08-12T08:44:45","slug":"owa-light-ist-nach-microsofts-august-exchange-update-endgultig-verschwunden","status":"publish","type":"post","link":"https:\/\/windowsreport.com\/de\/owa-light-ist-nach-microsofts-august-exchange-update-endgultig-verschwunden\/","title":{"rendered":"OWA Light ist nach Microsofts August-Exchange-Update endg\u00fcltig verschwunden"},"content":{"rendered":"\n<p>Microsoft hat die Exchange-Server-Sicherheitsupdates vom August 2026 f\u00fcr Exchange Server Subscription Edition, Exchange Server 2019 und Exchange Server 2016 ver\u00f6ffentlicht.<\/p>\n\n\n\n<p>Die <a href=\"https:\/\/techcommunity.microsoft.com\/blog\/exchange\/released-august-2026-exchange-server-security-updates\/4543951\" target=\"_blank\" rel=\"noopener noreferrer\">neuen Exchange-Server-Sicherheitsupdates<\/a> beheben mehrere Sicherheitsl\u00fccken, wobei die meisten Korrekturen auf Spoofing- und Rechteerweiterungsprobleme abzielen.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-owa-light-is-now-permanently-disabled\">OWA Light wird jetzt dauerhaft deaktiviert<\/h2>\n\n\n\n<p>Die Sicherheitsupdates vom August deaktivieren Outlook Web App Light in Exchange Server dauerhaft.<\/p>\n\n\n\n<p>Microsoft k\u00fcndigte die Einstellung der Funktion bereits vor mehreren Jahren an und erinnerte Exchange-Administratoren im Juli daran, dass mit der Deaktivierung von OWA Light ab August 2026 begonnen werde.<\/p>\n\n\n\n<p>Unternehmen, die die neuesten Exchange-Server-Updates nicht installieren k\u00f6nnen, sollten OWA Light manuell deaktivieren, um potenzielle Sicherheitsrisiken zu reduzieren.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-known-exchange-hybrid-issue-remains\">Bekanntes Exchange-Hybrid-Problem bleibt bestehen<\/h3>\n\n\n\n<p>Die August-Version enth\u00e4lt auch ein bekanntes Problem, das Microsoft erstmals im Juni 2026 dokumentiert hat.<\/p>\n\n\n\n<p>Es betrifft Exchange Server Subscription Edition, Exchange Server 2019 und Exchange Server 2016 in bestimmten Hybridkonfigurationen, bei denen freigegebene Postf\u00e4cher in Exchange Online und lokal gehostete Postf\u00e4cher verwendet werden.<\/p>\n\n\n\n<p>Das Problem kann auftreten, wenn Unternehmen die Berechtigungen Send As oder Send on Behalf verwenden und gleichzeitig MessageCopyForSentAsEnabled oder MessageCopyForSendOnBehalfEnabled aktivieren.<\/p>\n\n\n\n<p>In betroffenen Umgebungen k\u00f6nnen Nachrichten, die als oder im Auftrag eines freigegebenen Postfachs gesendet werden, auch im Posteingang des freigegebenen Postfachs erscheinen. Exchange stellt die urspr\u00fcngliche Nachricht als Anlage in einer separaten Wrapper-Nachricht zu.<\/p>\n\n\n\n<p>Microsoft plant, das Problem in einer zuk\u00fcnftigen Exchange-Server-Version zu beheben.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-exchange-2016-and-2019-updates-have-limited-availability\">Updates f\u00fcr Exchange 2016 und 2019 sind nur eingeschr\u00e4nkt verf\u00fcgbar<\/h3>\n\n\n\n<p>Das Update f\u00fcr Exchange Server Subscription Edition steht allen Kunden zur Verf\u00fcgung.<\/p>\n\n\n\n<p>Die Sicherheitsupdates f\u00fcr Exchange Server 2019 und Exchange Server 2016 stellt Microsoft jedoch nur Kunden zur Verf\u00fcgung, die f\u00fcr Periode 2 der Extended Security Updates registriert sind.<\/p>\n\n\n\n<p>Die ESU-Abdeckung der Periode 2 bietet Sicherheitsupdates f\u00fcr Exchange Server 2016 und 2019 bis Oktober 2026.<\/p>\n\n\n\n<p>Die Exchange-Korrekturen wurden zusammen mit dem umfassenderen August-Sicherheitsrollout von Microsoft ver\u00f6ffentlicht. Die <a href=\"https:\/\/windowsreport.com\/de\/microsoft-behebt-rund-400-sicherheitslucken-im-august-2026-patch-tuesday\/\" target=\"_blank\" rel=\"noopener noreferrer\">Updates zum Patch-Tuesday vom August 2026 haben rund 400 Sicherheitsl\u00fccken geschlossen<\/a>, darunter Dutzende mit der Bewertung \u201eKritisch\u201c.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Microsoft hat die Exchange-Server-Sicherheitsupdates vom August 2026 f\u00fcr Exchange Server Subscription Edition, Exchange Server 2019 und Exchange Server 2016 ver\u00f6ffentlicht. Die neuen Exchange-Server-Sicherheitsupdates beheben mehrere Sicherheitsl\u00fccken, wobei die meisten Korrekturen auf Spoofing- und Rechteerweiterungsprobleme abzielen. OWA Light wird jetzt dauerhaft deaktiviert Die Sicherheitsupdates vom August deaktivieren Outlook Web App Light in Exchange Server dauerhaft. Microsoft [&hellip;]<\/p>\n","protected":false},"author":49,"featured_media":5213,"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-5212","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 v28.2 (Yoast SEO v28.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>OWA Light ist nach Microsofts August-Exchange-Update endg\u00fcltig verschwunden<\/title>\n<meta name=\"description\" content=\"Microsoft ver\u00f6ffentlicht die Exchange-Server-Sicherheitsupdates vom August 2026, die mehrere Sicherheitsl\u00fccken beheben und OWA Light dauerhaft deaktivieren\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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