Microsoft 365 Administrator Expert MS-102 Practice Question
Your company uses Microsoft Defender for Office 365. You must be notified whenever any user sets up client-side forwarding that sends email to an external domain. The security team requires the notification to appear in the Microsoft 365 Defender portal and to be delivered by email, without relying on custom scripts or third-party services. What should you do first to meet the requirement with the least administrative effort?
Enable mailbox auditing for all users and build a scheduled advanced hunting query that emails results.
Configure an Exchange transport rule that blocks external forwarding and enable audit logging.
Create a new custom alert policy in Microsoft 365 Defender and select the activity "User created or modified an inbox rule that forwards messages".
Create a Conditional Access policy that prevents external forwarding of email.
Microsoft 365 Defender includes built-in auditing of mailbox activities such as creating or modifying inbox rules. Creating a new alert policy and choosing the activity "User created/updated an inbox rule that forwards messages" causes Defender to generate an alert each time a client-side forwarding rule to an external recipient is saved. When the policy is saved with Medium severity and email recipients specified, the alert automatically appears in the Defender portal and an email notification is sent. Transport rules, Conditional Access, or scheduled hunting queries either do not generate Defender alerts or require additional configuration that exceeds the stated effort.
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Microsoft 365 Administrator Expert MS-102
Manage security and threats by using Microsoft Defender XDR
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