Outlook 97 Inbox Message View

I have a user whose Inbox subfolders Message view somehow changed. It used to be the default settings for the “Message” view but now it’s changed so there’s a “Group By” Subject & the Fields have changed. I verified the user didn’t make any changes themselves. What’s really strange it didn’t happen to all the subfolders.

Is there a way to all the folders back to the default settings at the same time?

Thanks for any help.
Russ