Suspicious phishing email to organization email accounts

Question

Good day everyone,

I have a client that received an email from a gmail account that was sent to all the email address in the organization with the GM's name, surname and other personal information. The client only has the free AD subscription and no Microsoft 365 Defender license.

What I did was, was to create a policy in Microsoft Exchange to block that specific email account and sent it to the recipient's junk folder and to quarantine the email. Is there anything else I can do to investigate the situation or add security measures to prevent something like this happening again?

PS: Like I mentioned the client has the free AD subscription and no Microsoft 365 Defender license.

Thanks in advanced

Answer 1

Hi,

First is the user training and guidance that they should not click or share / open links. Also you can review the 90 days free MS Defender and evaluate policies and settings for the tenant.

Review the protection you can implement and start with basic policies to restrict the phishing mails, spoofing.

https://learn.microsoft.com/en-us/microsoft-365/security/office-365-security/anti-phishing-protection-about?view=o365-worldwide

Share this with the users so they are trained and aware of the phishing mails - https://support.microsoft.com/en-gb/windows/protect-yourself-from-phishing-0c7ea947-ba98-3bd9-7184-430e1f860a44

Hope this helps.

JS

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