{"id":25586,"date":"2026-08-12T08:51:53","date_gmt":"2026-08-12T08:51:53","guid":{"rendered":"https:\/\/windowsreport.com\/fr\/owa-light-a-definitivement-disparu-apres-la-mise-a-jour-exchange-daout-de-microsoft-2\/"},"modified":"2026-08-12T08:51:53","modified_gmt":"2026-08-12T08:51:53","slug":"owa-light-a-definitivement-disparu-apres-la-mise-a-jour-exchange-daout-de-microsoft-2","status":"publish","type":"post","link":"https:\/\/windowsreport.com\/fr\/owa-light-a-definitivement-disparu-apres-la-mise-a-jour-exchange-daout-de-microsoft-2\/","title":{"rendered":"OWA Light a d\u00e9finitivement disparu apr\u00e8s la mise \u00e0 jour Exchange d\u2019ao\u00fbt de Microsoft"},"content":{"rendered":"\n<p>Microsoft a publi\u00e9 les mises \u00e0 jour de s\u00e9curit\u00e9 d\u2019ao\u00fbt 2026 pour Exchange Server Subscription Edition, Exchange Server 2019 et Exchange Server 2016.<\/p>\n\n\n\n<p><a href=\"https:\/\/techcommunity.microsoft.com\/blog\/exchange\/released-august-2026-exchange-server-security-updates\/4543951\" target=\"_blank\" rel=\"noopener noreferrer\">Les nouvelles mises \u00e0 jour de s\u00e9curit\u00e9 Exchange Server<\/a> corrigent plusieurs vuln\u00e9rabilit\u00e9s, la plupart des correctifs visant des probl\u00e8mes d\u2019usurpation d\u2019identit\u00e9 et d\u2019\u00e9l\u00e9vation de privil\u00e8ges.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-owa-light-is-now-permanently-disabled\">OWA Light est d\u00e9sormais d\u00e9finitivement d\u00e9sactiv\u00e9<\/h2>\n\n\n\n<p>Les mises \u00e0 jour de s\u00e9curit\u00e9 d\u2019ao\u00fbt d\u00e9sactivent d\u00e9finitivement Outlook Web App Light dans Exchange Server.<\/p>\n\n\n\n<p>Microsoft a annonc\u00e9 la d\u00e9pr\u00e9ciation de cette fonctionnalit\u00e9 il y a plusieurs ann\u00e9es et a rappel\u00e9 aux administrateurs Exchange en juillet qu\u2019il commencerait \u00e0 d\u00e9sactiver OWA Light en ao\u00fbt 2026.<\/p>\n\n\n\n<p>Les organisations qui ne peuvent pas installer les derni\u00e8res mises \u00e0 jour d\u2019Exchange Server doivent d\u00e9sactiver manuellement OWA Light afin de r\u00e9duire les risques de s\u00e9curit\u00e9 potentiels.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-known-exchange-hybrid-issue-remains\">Un probl\u00e8me connu de configuration hybride Exchange persiste<\/h3>\n\n\n\n<p>La version d\u2019ao\u00fbt reconduit \u00e9galement un probl\u00e8me connu que Microsoft a document\u00e9 pour la premi\u00e8re fois en juin 2026.<\/p>\n\n\n\n<p>Il affecte Exchange Server Subscription Edition, Exchange Server 2019 et Exchange Server 2016 dans certaines configurations hybrides impliquant des bo\u00eetes aux lettres partag\u00e9es h\u00e9berg\u00e9es dans Exchange Online et des bo\u00eetes aux lettres h\u00e9berg\u00e9es en local.<\/p>\n\n\n\n<p>Le probl\u00e8me peut appara\u00eetre lorsque les organisations utilisent les autorisations Send As ou Send on Behalf tout en activant MessageCopyForSentAsEnabled ou MessageCopyForSendOnBehalfEnabled.<\/p>\n\n\n\n<p>Dans les environnements concern\u00e9s, les messages envoy\u00e9s en tant que bo\u00eete aux lettres partag\u00e9e ou pour le compte de celle-ci peuvent \u00e9galement appara\u00eetre dans la bo\u00eete de r\u00e9ception de la bo\u00eete aux lettres partag\u00e9e. Exchange remet le message d\u2019origine sous forme de pi\u00e8ce jointe dans un message conteneur distinct.<\/p>\n\n\n\n<p>Microsoft pr\u00e9voit de corriger ce probl\u00e8me dans une prochaine version d\u2019Exchange Server.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-exchange-2016-and-2019-updates-have-limited-availability\">Les mises \u00e0 jour pour Exchange 2016 et 2019 ont une disponibilit\u00e9 limit\u00e9e<\/h3>\n\n\n\n<p>La mise \u00e0 jour d\u2019Exchange Server Subscription Edition est disponible pour tous les clients.<\/p>\n\n\n\n<p>Cependant, Microsoft fournit les mises \u00e0 jour de s\u00e9curit\u00e9 pour Exchange Server 2019 et Exchange Server 2016 de mani\u00e8re priv\u00e9e uniquement aux clients inscrits \u00e0 la P\u00e9riode 2 des Extended Security Updates.<\/p>\n\n\n\n<p>La couverture ESU de la P\u00e9riode 2 fournit des mises \u00e0 jour de s\u00e9curit\u00e9 pour Exchange Server 2016 et 2019 jusqu\u2019en octobre 2026.<\/p>\n\n\n\n<p>Les correctifs Exchange ont \u00e9t\u00e9 publi\u00e9s en m\u00eame temps que le d\u00e9ploiement de s\u00e9curit\u00e9 d\u2019ao\u00fbt plus large de Microsoft. Les mises \u00e0 jour du Patch Tuesday d\u2019ao\u00fbt 2026 ont corrig\u00e9 environ 400 vuln\u00e9rabilit\u00e9s, dont des dizaines class\u00e9es comme critiques.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Microsoft a publi\u00e9 les mises \u00e0 jour de s\u00e9curit\u00e9 d\u2019ao\u00fbt 2026 pour Exchange Server Subscription Edition, Exchange Server 2019 et Exchange Server 2016. Les nouvelles mises \u00e0 jour de s\u00e9curit\u00e9 Exchange Server corrigent plusieurs vuln\u00e9rabilit\u00e9s, la plupart des correctifs visant des probl\u00e8mes d\u2019usurpation d\u2019identit\u00e9 et d\u2019\u00e9l\u00e9vation de privil\u00e8ges. OWA Light est d\u00e9sormais d\u00e9finitivement d\u00e9sactiv\u00e9 Les [&hellip;]<\/p>\n","protected":false},"author":49,"featured_media":25587,"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-25586","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 v28.2 (Yoast SEO v28.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>OWA Light a d\u00e9finitivement disparu apr\u00e8s la mise \u00e0 jour Exchange d\u2019ao\u00fbt de Microsoft<\/title>\n<meta name=\"description\" content=\"Microsoft publie les mises \u00e0 jour de s\u00e9curit\u00e9 d&#039;ao\u00fbt 2026 pour Exchange Server, corrigeant plusieurs vuln\u00e9rabilit\u00e9s et d\u00e9sactivant 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