Outlook can subscribe to internet calendars permanently. The right path matters: “Subscribe from web” – not “Import file”, because only the subscription keeps itself up to date.
The fastest route is the subscribe dialog on the calfeed page: “Subscribe” → “Outlook”. Pick the matching variant there – Outlook (Classic), Outlook (New), Outlook Web (Mobile), or Microsoft 365 (Business) – and just confirm. Manually it works like this:
Outlook on the web and new Outlook for Windows
- Copy the calendar URL of the calfeed (how to find it).
- Sign in at outlook.com or Microsoft 365 and switch to the calendar view. The new Outlook for Windows works the same way.
- Click “Add calendar” → “Subscribe from web”.
- Paste the calendar URL, give it a name, and confirm.
Classic Outlook (desktop)
- Switch to the calendar and click “Open Calendar” → “From Internet …” in the ribbon.
- Paste the calendar URL and answer the question whether to subscribe and check for updates with “Yes”.
Good to know
- Outlook.com and Microsoft 365 fetch subscribed calendars on their own schedule – usually a few hours, sometimes longer (more about freshness).
- For work and school accounts, choose the “Microsoft 365 (Business)” option in the subscribe dialog. Only if that fails too has your administrator blocked internet calendars – then a personal Microsoft account is the way.
- The Outlook mobile app cannot add a calendar by URL – set up the subscription on the web; it then appears in the app as well.
- The subscribe button reports an error? Occasionally the direct subscribe link fails in Outlook. The reliable way is to add the calendar URL manually via “Subscribe from web” as described above.
- The new Outlook for Mac currently lacks the subscribe option in some versions. Set up the subscription in the browser at outlook.com or Microsoft 365 – it then appears in the Mac app as well.
