Hi, @Eddie79 When you change the sharing settings in SharePoint from "anyone" to "new and existing guest," it can affect file access in Teams. Users may find that they are unable to access files in Teams, even if they are the file owners. This is because Teams relies on SharePoint permissions for file access. To address this issue, you can try adjusting Teams settings, sharing files directly in Teams, creating a separate SharePoint site with different sharing settings, or educating users about the changes. If you need further assistance, consider reaching out to Microsoft Support or your organization's IT department.