What should you configure?

You have a Microsoft Exchange Online tenant.

You discover that a virus has infected the mailboxes of several users. The users are currently spreading the virus by emailing attachments that contain the virus.

You need to temporarily prevent all users from emailing attachments while you remove the virus from all the mailboxes.

What should you configure?
A . a connection filter
B . a mail flow rule
C . a connector
D . a spam fitter

Answer: B

Explanation:

Reference: https://docs.microsoft.com/en-us/exchange/security-and-compliance/mail-flow-rules/common-attachmentblocking-scenarios