How to remove ical import

Question

How to remove ical import

Luke Dickson 0

I have imported a calendar via ics and it has connected to my main calendar. This is causing syncing issues with other apps that I use and I cant find a way to remove this, does anyone know? I have read that it is a glitch with outlook but not how to fix it

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Answer 1

Hi @Luke Dickson,

Thank you for posting your question in the Microsoft Q&A forum.

I understand how inconvenient this situation can be, especially when an iCalendar ends up merging into your main calendar and then begins causing synchronization issues across other apps.

The best way to remove the calendar depends on how it was originally added, as Outlook supports two different behaviors: subscribing to a calendar versus importing/uploading one.

1/ If you subscribed to an iCal feed (using a web link):

Subscribed calendars usually appear as a separate calendar in the left pane under My calendars or Other calendars. In this case, you can simply hide it by unchecking it, or remove/delete that calendar entirely from the list. Microsoft also notes that while you can delete calendars you added, the primary calendar itself cannot be deleted. You can review this here: Delete a calendar in Outlook.

2/ If you imported or uploaded an .ICS file into your main calendar:

This appears to be the scenario you described, where the events are now “connected to your main calendar.” When an iCalendar file is imported, the events are copied directly into the selected calendar. Unfortunately, Outlook does not provide a single option to undo the import or remove all items from that file afterward. As confirmed in Microsoft Q&A discussions, once events are merged into the main calendar, especially in Outlook on the web, there is no built‑in bulk “undo” option, so the events must be removed manually. You can see a related discussion here: How do I delete an uploaded ICS file on the web outlook calandar?.

If a large number of events were imported and you need a more efficient way to remove them, a commonly recommended approach is to use Classic (Legacy) Outlook. By switching the Calendar to List View, you can multi‑select the imported items and delete them in bulk rather than one by one. A Microsoft Q&A moderator outlines this “List View > select > delete” method for cases where items were imported into the main calendar. Before doing this, it’s strongly recommended to export or back up your calendar to avoid accidentally deleting legitimate events. More details are available here: How to remove a calendar subscription that is embedded in my outlook "My Calendar.

To help prevent this from happening again, when adding an .ICS file in Outlook on the web, you’re prompted to choose which calendar the file is imported into. Creating a temporary or separate calendar for imports makes it much easier to delete the entire calendar later if needed.

You may also find Microsoft’s guidance helpful here: Import or subscribe to a calendar in Outlook.com or Outlook on the web , which explains the difference between subscribing to a calendar and uploading/importing one.

I hope this helps clarify the situation and move things forward. Please feel free to let us know how it goes, or if you need any further assistance.

I’m looking forward to hearing from you.

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Killian-N 9,380 Reputation points Microsoft External Staff Moderator

2026-02-17T22:43:05.41+00:00

Hi @Luke Dickson,

I hope everything is going well on your end.

I am following up on the support thread that has been discussed and wanted to check whether the information shared in my previous response helped address the issue you were experiencing.

If you are still encountering any issues or have additional questions, please feel free to reach out at any time. I would be happy to assist further as needed.

Additionally, ensuring that everything is functioning as expected and that your experience remains smooth is a top priority.

Thank you again for your collaboration throughout the troubleshooting process. I look forward to hearing from you soon.

Warm regards,
Luke Dickson 0 Reputation points

2026-02-18T07:27:20.91+00:00

Hi Killian,

Deleting them all off individually has worked, thank you.

My outlook is connected to OneCalendar, which still isn't working since the initial ical import. I receive an error message as it wont sync or load. I don't suppose you know how I may rectify this do you?

Thank you
Killian-N 9,380 Reputation points Microsoft External Staff Moderator

2026-02-18T22:11:56.36+00:00

Hi @Luke Dickson,

Thank you for the update. I’m glad to hear that manually removing the imported events resolved the calendar merge issue.

Regarding OneCalendar, the behavior you’re seeing is unfortunately consistent with what happens after an .ics import has previously caused sync conflicts. Even once the events are removed, the third‑party app may still be trying to sync against cached or stale calendar data, which can result in errors or the calendar failing to load.

Since OneCalendar is a third‑party application, Outlook itself doesn’t provide a way to reset that connection from the Microsoft side. However, the following steps are commonly recommended and may help resolve the issue:

Remove and re‑add the Outlook account in OneCalendar: Fully disconnect your Outlook account from OneCalendar, then add it back again so the app rebuilds the sync from a clean state.

Clear OneCalendar’s local cache or data: If OneCalendar provides an option to reset, clear cache, or refresh data within its settings, using that option can help eliminate residual sync references.

Verify permissions: Re‑check that OneCalendar still has permission to access your Outlook calendar after the cleanup. In some cases, re‑authorizing access resolves sync errors.

Test directly in Outlook on the web: Since Outlook on the web is now behaving correctly, this helps confirm the calendar itself is healthy and that the issue is isolated to the third‑party sync.

If the error continues after reconnecting the account, the next best step would be to reach out to OneCalendar’s support team, as they’re best equipped to troubleshoot app‑specific sync errors and logs.

Thank you for following up and sharing the outcome.
Luke Dickson 0 Reputation points

2026-02-19T21:21:45.6533333+00:00

Thank you this is very helpful and has solved my issue!
Killian-N 9,380 Reputation points Microsoft External Staff Moderator

2026-02-19T21:52:40.84+00:00

Hi @Luke Dickson,

Thank you for providing the update on the status of your case.

It is great to hear that the issue has been resolved. If you found the response helpful, marking it as the accepted answer would be greatly appreciated. This helps surface the solution for other community members who may be searching for similar guidance and, in turn, supports a more informative and collaborative forum experience.

Thank you again for your time and cooperation throughout the resolution process. Should any questions or concerns arise in the future, please feel free to reach out. I would be happy to assist, and the moderators in the Microsoft Q&A forum remain available to provide additional guidance as needed.

Thank you for your continued engagement and for contributing to the Microsoft Q&A community.

Answer 2

The context provided does not contain specific information on how to remove an iCal import from Outlook or how to address syncing issues caused by such imports. Therefore, I cannot provide a solution based on the available information.

For assistance with removing an iCal import, you may want to check Outlook's settings or consult the Microsoft support documentation for more detailed guidance on managing calendar imports and resolving syncing issues.

References:

Calendar on mobile device isn't synced to the calendar in an Exchange Online mailbox when you use Exchange ActiveSync
You can't remove a calendar item or an email message in Outlook in Microsoft 365

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How to remove ical import

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