unwanted email invites from fake microsoft account

If you are receiving unwanted calendar invites from a fraudulent Microsoft account, it is advisable to take the following steps:

1. Do Not Accept the Invites: Avoid accepting any invites from unknown or suspicious sources.
2. Report the Invites: Use the reporting features in your email or calendar application to report these invites as spam or phishing attempts.
3. Block the Sender: You can block the email address of the sender to prevent further invites from that account.
4. Check Your Calendar Settings: Ensure that your calendar settings do not allow anyone to send you invites without your approval.
5. Stay Vigilant: Be cautious of any links or attachments in the invites, as they may lead to phishing sites or malware.

If the problem persists, consider reaching out to Microsoft support for further assistance.

References:

• Microsoft 365 services for external email senders
• Abuse and spam reporting for junk email originating from Exchange Online

Hi Maureen,

The reason these invites are showing up directly on your calendar, often without you accepting them, comes down to a default setting in Outlook designed for convenience: automatic processing of invitations.

Outlook, by default, is set up to automatically add any meeting request to your calendar the moment it arrives in your inbox. This is great for legitimate work invites but terrible for spam, as spammers exploit this feature. When they send the invite, it lands on your calendar immediately.

The fraudulent accounts are simply using this automation to push their spam onto your screen.

We need to change your settings so that you have manual control over what goes onto your calendar.

The "Do Not Interact" Rule

The most crucial immediate action is to avoid accepting, declining, or clicking any links in these invites. Interacting with them, even to decline, often confirms to the spammers that your email address is active, leading to more spam.

The Safe Way to Delete: If you need to remove the event from your calendar, find the original email invitation in your Inbox or Junk Email folder and simply delete the email itself without sending a response.

Change Your Outlook Settings (The Core Fix)

This change is the primary defense mechanism that stops the automatic calendar entries.

For Outlook on the Web (Outlook.com):

Sign in to your account on the Outlook.com website.

Click the Settings gear icon in the top right corner.

Choose View all Outlook settings at the bottom of the panel.

Navigate to Calendar > Events from email.

For every category listed (Flights, Hotel reservations, etc.), select the option __"__Don't show event summaries in email or on my calendar". This puts you back in charge.

While you're in settings, go to Mail > Junk email and add the full fraudulent email address or their domain (the part after the @ symbol) to the Blocked senders and domains list.

For the Outlook Desktop App (Microsoft 365/Desktop Software):

Open your Outlook application.

Go to the File menu and select Options.

In the Options window, select the Mail section from the left column.

Scroll down until you find the Tracking section.

Uncheck the box that says: "Automatically process meeting requests and responses to meeting requests and polls".

Click OK to save this important change.

By following these steps, you are essentially building a manual filter system, forcing all invites to await your explicit approval before they clutter your schedule. This should effectively stop the nuisance.

@maureen buckley

If your problem matches the one described in this post:
https://v4.hkg1.meaqua.org/en-us/answers/questions/5597205/prevent-pfishing-calendar-items

Microsoft is aware of the problem but there is currently no fix. There are no Rules you can create or settings you can change in the Outlook client that will stop these SPAM Calendar Events.

Hal Hostetler MVP-Outlook MVP Volunteer Moderator Oct 26, 2025, 12:21 PM

FWIW, this issue has been reported to Outlook Engineering, they are aware of the problem, and are investigating it.

SPAM Calendar Events - Update 2025-12-05 - Still an ongoing issue. No update from Microsoft on a general solution.

If your organization has a Microsoft Defender for Office 365 subscription, there are steps your IT Admin can take to mitigate the impact:

https://techcommunity.microsoft.com/blog/microsoftdefenderforoffice365blog/strengthening-calendar-security-through-enhanced-remediation/4456876

If you are in an IT Managed environment, there are Mail Flow Rules that your IT Admin can implement that will block all external Calendar invites (and allow for specific exceptions):

https://v4.hkg1.meaqua.org/en-us/answers/questions/5558001/how-to-prevent-calendar-invites-from-external-sour