Unable to add internet calendar in Outlook

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Unable to add internet calendar in Outlook

Edward Rosario 20

Each time I add a Calendar, one of the exiting ones disappears and the new one is not created either. I tried through Files/ Account Settings/Internet Calendars but the "New..." is greyed out. I saw there a note at bottom of page that indicated I need to add through "Add Calendar > From Internet selected from Home > Add Calendar in the Calendar ribbon. However, it also does not work. It does not add the new Calendar as I add the web internet address and save it. I noticed it removes randomly one of the existing Calendar accounts. Not sure if it is messing up the location file of one of the existing Calendars. This is a nightmare. It used to be so easy in the past.

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Answer 1

Gabe Bratton 301 Microsoft Employee Moderator

I tested adding a couple of my Gmail accounts calendars using the secret address in iCal format. I did Home, Add Calendar, from Internet. I pasted in the .ics URL from Gmail and clicked OK. Both calendars added under shared calendars. A bit of confusion is that I got an error after I did the add but the calendar was added anyway. The calendars you are adding do they end in .ics?

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Another way I got an internet calendar was for my college's Football schedule. When I requested that calendar it downloaded an .ics file. To add that calendar I double clicked on the .ics file and clicked Open as New. This calendar got added to the section Other Calendars.

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Double check the calendar is not getting added with an abbreviated name. You can right click on the calendar and rename it if that happened.

Edward Rosario 20 Reputation points

2025-08-27T00:33:51.2733333+00:00

I am working to add two Calendars. One of them was deleted as part of troubleshooting. I used the ICS for one and the link address for the other. Both methods did work. However, when I hover over the Calendar name, it added in the name my primary Calendar (primary account). When renaming, the name of my primary Calendar still shows like a file extension name. I can no longer keep it like I had it before (for the Calendar that I deleted). In addition, none shows up on the Internet Calendars list within Account Settings, as shown before. Although it is working, it seems to be appended to my primary Calendar and not as a separate internet Calendar. What can you say about this?
Gabe Bratton 301 Reputation points Microsoft Employee Moderator

2025-08-27T13:40:20.9666667+00:00

None of my internet calendars show on the Internet Calendars in Account Settings. I will ask the Outlook Team about this, but I believe this dialog is deprecated. This is implied by the note to add an Internet Calendar from the calendar ribbon.

What is the internet calendar that has your primary calendar name? Is this created from your primary calendar? Whatever the case, you can rename the calendar to be what you want it to be.

Another bug I see is that the Internet Calendars get added to different calendar groups in the navigation pane. I dragged mine to Other Calendars to have them together.
Edward Rosario 20 Reputation points

2025-08-27T14:54:23.0133333+00:00

Seems dialog (which show Internet Calendars in Account Settings) may no longer be working (deprecated). However, this was recent because upon adding my yahoo and gmail accounts (about a month ago) these were showing up as internet Calendars at this dialog.

My primary calendar is the one for my personal Microsoft account (hotmail.com). Internet Calendars were the ones added with the addition of other 3rd party email accounts (yahoo, gmail, aol, etc.). My gmail calendar still works fine. I lost aol and yahoo calendars for which now I experienced the calendar addition issue. I tried deleting and readding but the internet Calendars do not come up anymore when adding new email accounts (3rd party).

I was now able to add aol and yahoo calendars and was able to rename them. However, upon hovering with cursor over them, the primary calendar name (@hotmail.com) is still appended. For example, for my yahoo internet calendar:

Calendar - ******@yahoo.com - ******@hotmail.com

The name on the tabs above showing all Calendars display correctly without appended "@hotmail.com". I conclude Outlook application now works differently.

Thanks for your support.

Answer 2

Hello Edward. This situation is more likely the result of corruption/misconfiguration in the Outlook calendar data files specifically the Internet Calendar Subscriptions.pst file that tracks linked calendar data. If the Internet Calendar Subscriptions.pst file is missing, corrupted, or pointed to the wrong location in Outlook, it is possible emerged symptoms when trying to add new calendars as new calendars will simply not add, and the solution may remove calendars randomly when trying to use existing calendars. Since the “New…” button is not usable, and the ribbon method also fails, it’s likely either that the calendar subscription system is corrupt.

To address the situation first repair your Outlook profile through Control Panel > Mail > Show Profiles > Manage Profiles > Repair. Next check for past file corruption in scoped by running ScanPST.exe in the Office install folder.

If the behavior continues to exist, creating an entire new Outlook profile and adding these calendars again from scratch may be your only solution.

Hope this helps.

Best regards,

Edward Rosario 20 Reputation points

2025-08-27T15:03:39.45+00:00

Thanks for your response.

I ruled out corruption of Outlook calendar data files. I have been setting these from scratch in a new laptop. Apparently, Outlook just changed the way 3rd party Calendars (internet calendars) are added. I was able to finally add these but apparently the data files is appended somehow to the primary Calendar data file. Refer to comments in previous thread.

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Unable to add internet calendar in Outlook

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