We have been running 3cx for awhile now, the last 60 days have been a nitemare, every since we upgrade to service pack 2 and then to 4 our MyPhone stop functioning after 30 days. It does a 503 Service Unavailable. Only way to fix this is to uninstall, reboot, reinstall and restore the backup which is time consuming. We have tried restart IIS and services. Rebooting nothing works. Only reinstalling the whole thing from scratch every time. Anyone have any idea why this would happen every 30 days ?