What Antivirus Does

Antivirus is a guard at the door. Every file that arrives — an email attachment, a document you upload, a picture in a chat, a file someone sends through your website — is checked for viruses and other harmful programs before anyone can open it.

It's always on for every organization. You don't need to switch it on, and nobody can switch it off.

What it checks

• Email attachments as they arrive, and attachments you send from your own computer.
• Files you upload anywhere: documents, chat, the knowledge base, profile pictures, applications and more.
• Files people send you through public forms and job applications.

Files you attach from inside your organization (for example, a document already in your files) were checked when they first arrived, so they aren't checked again.

What happens when it finds something

• The harmful file is stopped and never saved. Not in your files, not in the mailbox, nowhere.
• Everything else carries on. An email with a harmful attachment is still delivered; only the attachment is taken out, and you see a locked card where it was.
• You're told in plain words what kind of harm it was, such as a password stealer or ransomware.
• Your administrators can see it in the Antivirus Center.

When a file is still being checked

Very rarely, Antivirus needs a moment to catch up. When that happens the file waits safely and shows Checking. It opens as soon as it's cleared. Nothing unchecked is ever let through.

When a file is found harmful later

Antivirus is updated many times a day as new threats appear. If a file that was already saved turns out to be harmful, it's locked for everyone and can't be opened, downloaded or shared again.

A quick example

Your loan processor receives an email from a borrower with "W2_2025.pdf.exe" attached. The email arrives as normal, but the attachment shows a red lock: Antivirus removed this file · Trojan. The processor asks the borrower to send the real PDF, and nobody's computer was ever at risk.