VPN Abuse

If the system is a personal device, you may register it by install the Microsoft's Company Portal App (for iOS, macOS, Android and Windows, as well for Linux/GNU in beta)

If you do not wish to install the Company Portal App, Please disable your VPN, may it be ExpressVPN or iCloud Private Relay (that comes built-in to iOS and macOS devices).

Known anonymous vpn proxy services

T-Mobile Secure WI-FI https://www.t-mobile.com/business/solutions/security/secure-wifi