{
  "is": "issue",
  "title": "Limitations with published calendars",
  "body": "\u003cp\u003eCurrently, subscribed Exchange calendars (.ics) cannot be updated in calendar applications. This is due to a known issue following the Exchange security update from August 2026.\u003c/p\u003e\n\u003cp\u003eYou can still access published calendars via a web browser.\u003c/p\u003e\n\u003cp\u003eMicrosoft has confirmed the issue. A fix is scheduled for one of the upcoming updates.\u003c/p\u003e\n\u003cp\u003eThe following clients are affected:\u003c/p\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n      \u003ctr\u003e\n          \u003cth\u003e\u003cstrong\u003eClient\u003c/strong\u003e\u003c/th\u003e\n          \u003cth\u003e\u003cstrong\u003eResult\u003c/strong\u003e\u003c/th\u003e\n      \u003c/tr\u003e\n  \u003c/thead\u003e\n  \u003ctbody\u003e\n      \u003ctr\u003e\n          \u003ctd\u003eMicrosoft Outlook, Web Calendar Subscription\u003c/td\u003e\n          \u003ctd\u003eHTTP 500\u003c/td\u003e\n      \u003c/tr\u003e\n      \u003ctr\u003e\n          \u003ctd\u003eApple Calendar on iOS and macOS\u003c/td\u003e\n          \u003ctd\u003eHTTP 500\u003c/td\u003e\n      \u003c/tr\u003e\n      \u003ctr\u003e\n          \u003ctd\u003eGoogle Calendar, Add a Calendar from a URL\u003c/td\u003e\n          \u003ctd\u003eHTTP 500\u003c/td\u003e\n      \u003c/tr\u003e\n      \u003ctr\u003e\n          \u003ctd\u003eMozilla Thunderbird\u003c/td\u003e\n          \u003ctd\u003eHTTP 500\u003c/td\u003e\n      \u003c/tr\u003e\n      \u003ctr\u003e\n          \u003ctd\u003eEvery script or automated consumer of the feed\u003c/td\u003e\n          \u003ctd\u003eHTTP 500\u003c/td\u003e\n      \u003c/tr\u003e\n      \u003ctr\u003e\n          \u003ctd\u003eChrome, Edge, Firefox, Safari, Android Chrome, iOS, Safari\u003c/td\u003e\n          \u003ctd\u003eHTTP 200, Calendar returned\u003c/td\u003e\n      \u003c/tr\u003e\n  \u003c/tbody\u003e\n\u003c/table\u003e\n",
  "createdAt": "2026-09-16 15:00:00 +0200 CEST",
  "lastMod": "2026-09-16 15:00:00 +0200 CEST",
  "permalink": "https://betriebsstatus.tu-dresden.de/en/issues/2026-09-16-einschrankungen_bei_veroffentlichten_kalendern/",
  "severity": "disrupted",
  "resolved": false,
  "informational": false,
  "resolvedAt": "",
  "affected": ["system_email_name"],
  "filename": "2026-09-16-einschrankungen_bei_veroffentlichten_kalendern.md"
}