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Company web page being marked as malicious

Anonymous
2025-05-05T16:17:43+00:00

We have received a report from a user, that any link that contains our company domain is flagged as malicious by Microsoft Defender safe link. Is there a way to check if our domain is blocked by Microsoft Defenders for everyone, or if it is a rule explicitly added by the user's organization?

Microsoft 365 and Office | Microsoft 365 Defender | Other | Other

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  1. Anonymous
    2025-05-05T22:17:38+00:00

    hello Shu, I hope you're okay,

    We will gradually rule out some factors as we will address this problem And we will determine if your page is really malicious, please send an email that includes the link of your domain to accounts that do not belong to your company, check if the link appears without problems, if this does not happen it would be because the blocking is due to internal policies of the client instead of a global inclusion in the list of Microsoft Defender is either due to a lack of an SSL certificate, and I recommend that you check in the Defender for Office 365 admin portal or in Microsoft 365 security Center https://security.microsoft.com right there we can explore in the permissions and blocks section to confirm if your domain has been added globally or if it is being affected by an incident, if it is a global problem you would have to contact Microsoft support or report it to them

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