We recommend you only edit the document if you trust its contents. Unless you need to edit, it's safer to stay in Protected View.', the file was received from a potentially unsafe sender. The file was received as an Outlook attachment and your computer policy has defined the sender as unsafe - When you see the message in Protected View that says 'Be careful - email attachments can contain viruses. Files from the Internet can have viruses and other harmful content embedded in them. Unless you need to edit, it's safer to stay in Protected View.', the file is being opened from the Internet. The file was opened from an Internet location - When you see the message in Protected View that says 'Be careful - files from the Internet can contain viruses. There are several reasons why a file opens in Protected View: Protected View is a read-only mode where most editing functions are disabled. How do I use Protected View with a screen reader? Why is my file opening in Protected View?

What happens to cloud fonts in Protected View? What happens to add-ins in Protected View? Protected View Trust Center settings explained I want to revoke trust from a document/documents that I've previously trusted to not open in Protected View I want to change my Protected View settings How do I exit Protected View so that I can edit, save, or print?

Why is my file opening in Protected View? Note: If your machine has Application Guard for Microsoft 365 enabled, documents that previously opened in Protected View will now open in Application Guard for Microsoft 365.

Excel open in protected view