Allow Safe Domains
You allow safe domains to approve access to specific content. For security reasons, external content can't be added to reports and reports can't be embedded in other applications unless it's safe to do so. Only administrators can allow safe domains.
Only authorized users may access the content. Except in cases where Single Sign On (SSO) is enabled, users are prompted to sign in when they access content on safe domains. After you have added a safe domain, users need to sign out and sign back in to access content from that source.