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cllee's avatar
cllee
Brass Contributor
Dec 20, 2025

Suspicious Calendar Invite

Hi,

On 19 Dec, I received an Outlook calendar reminder pop-up that showed a 16-week overdue event. But the email/calendar was sent on 19 Dec itself.

The calendar invite is from an unknown sender and has a suspicious subject line.

I attempted to open the calendar invite to check the content; however, the email hung. I proceed to End-Task to close the Outlook.

Would like to seek your thoughts on whether there is any risk of infection from malware/spyware when opening the suspicious calendar invite?

Thanks.

3 Replies

  • Hornblower409's avatar
    Hornblower409
    Brass Contributor

    I am part of a Q&A thread on a similar topic. Is this what you are seeing?

    https://learn.microsoft.com/en-us/answers/questions/5597205/prevent-pfishing-calendar-items

  • Yes possibly. More than liking the hacker was hoping you would click on a link and give out your password. I think many people are getting these hacker calendar invites. I'm getting them on my MS and Gmail accounts now, I just delete them. They are obnoxious, once an event landed on my calendar and booked me out a week. I was wondering why clients said I was busy. 

    • cllee's avatar
      cllee
      Brass Contributor

      Hi LisaHendrickson​,

      Thanks for your feedback.

      In my case, the calendar invite hung when I tried to open it. Did not manage to open the calendar, as i decided to end-task to close the entire Outlook. So in my case, I did not open any URL or attachments. 

      But I did double-click on the calendar, which hung. Will that be a risk as well? For just opening the calendar?

      Thanks.

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