In order to ensure your backup agent can communicate with the Acronis Cyber Cloud services, you should ensure the connections can pass through any Firewall that is currently in place. Please ensure the following Hostnames/IPs and ports are open in your Firewall before attempting to install or register the backup agent.
Network Hostnames & IP Addresses
baas.acronis.com / cloud.acronis.com
443, 8443, 7770-7800
Additionally, you can run the Connection Verification Tool to test for potential connection issues. For downloads and instructions on using this tool, please refer to https://kb.acronis.com/content/47678.