Messages sent between internal users aren't scanned for malware. It might take up to 1 hour for the changes to take effect.ĭoes the service scan internal messages for malware?įor organizations with Exchange Online mailbox, the service scans for malware in all inbound and outbound messages, including messages sent between internal recipients.Ī standalone EOP subscription scans messages as they enter or leave your on-premises email organization. If I make a change to an anti-malware policy, how long does it take after I save my changes for them to take effect? If you resend a message from a mailbox, then it's scanned again (because it's in transit). For Exchange Online mailboxes, we also have (zero-hour-auto-purge.md) to scan for malware in messages that have already been delivered. We scan for malware in messages that are sent to or sent from a mailbox (messages in transit). You can't choose one anti-malware engine over another. Our partners are subject to change, but EOP always uses anti-malware protection from multiple partners.
#Anti malware app for office 365 plus#
We have partnerships with multiple anti-malware technology providers, so messages are scanned with the Microsoft anti-malware engines, two added signature based engines, plus URL and file reputation scans from multiple sources. How many anti-malware partners do you have? Can I choose which malware engines we use? How often are the malware definitions updated?Įach server checks for new malware definitions from our anti-malware partners every hour. See (recommended-settings-for-eop-and-office365.md#eop-anti-malware-policy-settings). What are best practice recommendations for configuring and using the service to combat malware? This article provides frequently asked questions and answers about anti-malware protection for Microsoft 365 organizations with mailboxes in Exchange Online, or standalone Exchange Online Protection (EOP) organizations without Exchange Online mailboxes.įor questions and answers about the quarantine, see (quarantine-faq.yml).įor questions and answers about anti-spam protection, see (anti-spam-protection-faq.yml).įor questions and answers about anti-spoofing protection, see (anti-spoofing-protection-faq.yml). (exchange-online-protection-overview.md) (./includes/microsoft-defender-for-office.md)] Ms.assetid: 013c8a5f-8990-40e4-bfa8-f92ff1042623ĭescription: Admins can view frequently asked questions and answers about anti-malware protection in Exchange Online Protection (EOP).