Proxmox VE Standard Subscription 1 CPU/year

+ Access to Enterprise Repository
+ Stable software updates
+ Support via customer portal
+ Ten support tickets
+ Response time 4 hours within a business day (on critical support requests)
+ Remote support (via SSH)
+ Offline subscription key activation

Subscription period is one year from purchase date. Each Proxmox VE server needs a subscription with the right CPU-socket count. For details, see Terms & Conditions incl. Subscription Agreements