Microsoft 365 Messaging — Question 86

You have a Microsoft Exchange Online tenant named fabrikam.com that contains a user named User1.

User1 reports that three expected email messages from an external sender named[email protected]were NOT delivered. The external sender confirms that the messages were sent.

You run a message trace by using the All failed messages for the last 7 days default query.

In the results, you identify and expand one of the messages and discover the following error message.

550 5.1.10 RESOLVER.ADR.RecipientNotFound

You need to ensure that user1 can receive email messages from[email protected].

What should you do next?

Answer options

• A. Validate the MX record of fabrikam.com.
• B. Review the SPF record of contoso.com.
• C. Validate the email address of[email protected].
• D. Review the quarantine.

Correct answer: C

Explanation

The correct answer is C because the error indicates that the recipient's address could not be found, which suggests that there may be an issue with the email address itself. Options A and B are unrelated to the specific problem of the recipient not being found, while option D would only help if the email was caught in quarantine, which is not indicated by the error.