Outlook security alerts when trying to open .ICS

Question

Hi,

We're having an issue that triggers Outlook security alerts when trying to open .ICS calendar file.

Once double clicking on .ics file, a little window will pop-up saying "Microsoft Office has identified a potential security concern."

We're using O365 Outlook.

Is there a way to resolve this?

Answer 1

Hi @Mohammed Alobaidi ,

Welcome to our forum!

Based on my research, i found that the issue is related to a known issue which mentioned that this issue happens after installing the Outlook Desktop December 12th security updates:

It's suggested that you could temporarily disable the security notice you can use the registry key:

Group Policy registry path:

HKEY_CURRENT_USER\software\policies\microsoft\office\16.0\common\security

DWORD: DisableHyperlinkWarning Value: 1

(Note: Serious problems can occur if you modify the registry incorrectly. Before making changes, back up the registry to restore it in case something goes wrong.)

More information: Outlook prompts security notice opening .ICS files after installing protections for Microsoft Outlook Information Disclosure Vulnerability released: Dec 12, 2023.

Hope to help you!

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