How to remove an unwanted calendar invitation on my iPhone?

Hi HelpMeNowPlease01,

Thanks for contacting Apple Support Communities!

We understand that you need some help to remove a spam calendar invite.

Check out this resource which will show you how to remove a spam calendar invite: Delete spam calendars and events on iPhone - Apple Support

"How to remove calendar spam on your iPhone in earlier versions of iOS

1. Open the Calendar app.
2. At the bottom of the screen, tap Calendars.
3. Look for a calendar that you don't recognize. Tap the More Info button  next to that calendar, then scroll down and tap Delete Calendar.

If this doesn't fix the issue, delete the calendar subscription in Settings:

1. Open the Settings app.
2. Tap Calendar > Accounts. Or if you use iOS 13, tap Passwords & Accounts > Accounts instead.
3. Tap Subscribed Calendars.
4. Look for a calendar that you don't recognize. Tap it, then tap Delete Account."

We hope this helps you.

Cheers!

See here:

Calendar having unwanted Events Messages.… - Apple Community

I’ve noticed this happens when I check my junk mail on the outlook app on my iPhone. These phishing events get added and I can’t delete them even if I decline they pop back up.

However I have found a solution. When you untick the calendar yes you can’t see the events anymore but you also can’t see the events you had on this calendar. If things your main calendar then this is a problem. Sign out of Hotmail on your outlook calendar on your iPhone. Sign into Hotmail on desktop. Go to your calendar you will see the annoying unwanted events. Delete or decline them from here and they will disappear. Now sign back in on your iPhone through the outlook app and they should have gone.

So I have had to deal with this nuisance twice. Best thing that I have found for a temporary fix until they send another spam invite is to remove your Outlook calendar from your iPhone in your iPhone's settings. Delete the spam invite in your Outlook email and then add the calendar back to your iPhone. Good luck! MicroSoft really should fix this!

Just had this. Went into the calendar appointment. Clicked on invitees. Copies the address of the sender. Pasted it into the search bar in your inbox to find the toxic mail. Then put it in the junk mail. Calendar updates and removed all invitations

I had the same problem. Just could not figure it out. Read this. Went to Email settings, mail, accounts, outlook, and turned off Calendar. It all went away!

All you're doing from the above is not synching your outlook calendar onto your iphone. So the outlook calendar and entries will still be available via outlook / hotmail. un-synching outlook from the iphone seemed to work ok for me & solved issue. Guess you can then go into outlook calendar via hotmail etc and try to delete the entries directly from your outlook calendar. Once / if you've done this, then you can also reconnect your outlook calendar to your iphone to re-synch the calendars again. Although as I dont use my Outlook calendar, I haven't bothered with this step - just simply disconnected it from synching with Iphone & it has cured the problem. So from this, I assume this issue lies somewhere within Outlook / Hotmal?

I finally got my spam calendar events stopped. I went to my outlook email and went to the junk file and deleted all of it. When I went back to my calendar all the spam was gone.

Thanks for this tip. After I cut and then copied something else and shut down my Calendar. I reopened the calendar and the spam messages said cancelled with a line through them all. When I opened up the whole month of the calendar I could see all the dates had these cancelled messages that where still in my calendar which was annoying as they carried on for months. So, I clicked on the cancelled invitation and then clicked delete.

This removed all the cancelled invites out of my calendar!! :)

I had an unusual calendar invitation sent this morning that was spam, but in my foggy morning mind, I declined it instead of not touching it at all. I immediately changed all pw's on all accounts I have, but I couldn't figure out how to delete the calendar invite. When I opened it on my iCal app, there was no delete button. So, I did what @casperarizona recommended and deleted the calendar from my iPhone then it went away, I found this through a google search. Thank goodness, no harm was done. I was able to add the calendar app back on and the invite was gone.

Thanks for replying, HelpMeNowPlease01, and that additional info, it really helps! At this point, please contact Apple directly for further investigation:

Apple Support

Have a great day and thanks for using the Apple Support Communities!

I’m afflicted by the same issue.

Yes, deselecting the Outlook calendar removes the invitation from the iPhone, albeit at the expense of not being able to use my Outlook calendar with the iPhone.

The most bizarre thing I noticed, however, is that my Outlook calendar shows no such event or invitation. 🤷

Someone is VERY insidious.

I'm having this too. It shows it's from my Hotmail Calendar. I go to hotmail calendar in web browser and there is no event. I can't find anything relating to an email for "ALERT! Trojan DETECTED" event. I cannot decline the calendar entry and the only way to remove it so far is to disable my hotmail/outlook calendar, which I obviously would not want to do. I tried updating to iOS17 to see if that helped and still nothing.

Same problem for me - all of a sudden my iPhone calendar was showing all day entries from 1st Nov to 27th Dec for this; unable to decline invitation or delete etc.

After going thru settings > Calendar > accounts, noticed that my outlook account (for which I use for email) was also set (via the green button) to sync outlook calendar. I deselected this option (but left email still active) & okayed warning from iPhone that it would delete the outlook calendar entries and lo & behold the suspicious entries have now disappeared from iPhone calendar! Never use outlook calendar anyway - only always the iPhone calendar so no loss not to synch with outlook. And it certainly seems to have sorted issue. Looks like problem is with outlook….

On the other hand, I do sync my outlook calendar with my iPhone calendar and I cannot get this deleted. It is all day every day from Nov3 to Dec 29. I’ve tried all the steps I’ve seen here so far. I’ve tried deleting first and last days - and several in between - all without success!