Spammer inserted calendar appointment

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If you received an unexpected or spam calendar appointment in Outlook, it could be the result of various factors. It is important to note that receiving such invitations does not necessarily mean your machine has been compromised, as calendar spam can happen to anyone. Here are a few possibilities for how it may have occurred:

1. Calendar invitation spam: Spammers can send calendar invitations to email addresses they have obtained, hoping that users will accept or view the invitation. This can happen even if you have not directly clicked on any suspicious links or engaged with spam emails.
2. Shared calendar events: If you have shared your calendar with others or accepted calendar sharing invitations, it's possible that someone added the appointment as a prank or without your knowledge. Check your calendar sharing settings and review any shared calendar permissions you may have granted.
3. Malicious email attachments: Sometimes, malicious emails can contain calendar attachments that automatically add appointments to your calendar when opened. However, you mentioned that you do not click on unsolicited emails, so this is less likely the cause.

To mitigate the issue and prevent further occurrences, you can take the following steps:

1. Delete the appointment: Remove the unwanted appointment from your calendar by right-clicking on it and selecting the delete option.
2. Adjust calendar settings: Review your calendar sharing settings and ensure that only trusted individuals or contacts have permission to make changes to your calendar.
3. Update your antivirus software: Ensure that your antivirus software is up to date and perform a full system scan to check for any potential malware or viruses on your computer.
4. Be cautious with accepting invitations: Avoid accepting or opening calendar invitations from unknown or suspicious sources. Delete any suspicious invitations without responding or clicking on any links within them.

By following these steps, you can address the immediate issue and reduce the likelihood of future calendar spam. Additionally, maintaining good security practices such as keeping your software up to date, being cautious with email attachments, and regularly scanning your system for malware can help enhance your overall online security. The steps were processed using AI.

Hope this will help you.