Veeam License

For which Veeam product, and with regards to what exactly?

Assuming the Veeam Backup & Replication / Veeam ONE / Veeam Availability Suite:

There has historically been a “socket” based license whereby you licensed a specific version of Veeam: Standard/Enterprise/Enterprise Plus with different levels of features and you were licensed to protect the workloads that ran on that socket. This is for Hyper-V/VMware environments

More recently Veeam created the Veeam Universal License which is based on a “per instance” basis. You license to protect a certain number of instances and then it doesn’t matter if those instances are Cloud VMs (Azure/AWS/GCP), physical workstations or servers (Windows/Linux/macOS/Oracle Solaris/IBM AIX) or traditional VMs running on a hypervisor, you’re licensed for the full Enterprise Plus feature set with this.

Veeam also offer the “community edition” which covers 10 instances, but provides no actually support with themselves and no MSP/3rd Party is allowed to help you (excluding best effort basis posting on here or the R&D forum)

Hope this helps!