Shared Calendar HTML not working

Viktor Granström 20

Hey,

Viewing a shared calendar has not worked for more than a year now via outlook, with a link such as https://outlook.live.com/calendar/0/published/xxxxxxxxxxxxxxxxxxxxxxxx/xxxxxxxxxxxxx/cid-xxxxxxxxxxxxxx/calendar.html/

The .ICS works fine, but users can not use the HTML page as it redirects to login place - which did not happen before.

Can this please be fixed? Even as premium user it is not working.

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Answer accepted by question author

Kimberly Olaño 23,560

Hi! Viktor. Thanks for the details.

This is a known and intentional change Microsoft made, and unfortunately it’s not something broken on your end. Let me explain clearly what’s going on:

Until around mid-2023, Outlook.com and Microsoft 365 allowed you to publish a calendar as public HTML and share it with anyone, no sign-in required.

However, Microsoft quietly changed that behavior:

The HTML “view-only” link now redirects to a Microsoft sign-in page.
This happens even if the calendar is marked as public.
It affects both free Outlook.com and paid Microsoft 365 accounts, so premium status does not bypass it.

This is not a bug, Microsoft deprecated anonymous web-based calendar views due to security and privacy changes in Outlook and Exchange Online.

Best regards,

Kimberly

Viktor Granström 20 Reputation points

2025-09-26T07:14:08.0533333+00:00

Thank you for your response. Its disappointing to hear, seeing how close competitors can keep their same service running even for free. It seems the security and privacy changes can easily be worked around with actual development.

I see this only as another features thrown away while Microsoft increases the price of the subscriptions.

Here's hoping Microsoft gets this up and running again.

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