A: Yes. Deactivate the key from the old server (via the ESET GUI → Help → Deactivate License). Then activate on the new server. No need to buy a new key unless you have exceeded concurrent usage.
"C:\Program Files\ESET\ESET Security\ecmd.exe" /activate license_key_here eset file security for microsoft windows server license key
A: Yes. Use the command-line activation method described above. The real-time protection engine runs via a headless service. A: Yes
A: Yes. Every virtualized Windows Server instance running ESET File Security requires its own license key seat. However, ESET offers a special "Virtualization Security" product for the hypervisor level that protects all VMs with one license. eset file security for microsoft windows server license key