1 - The want to replicate VM's from their 3 Production vSphere Enterprise servers onto 3 new vSphere servers (vSphere Edition TBC - Essentials/Standard/Enterprise) to create a DR/BC environment... From a previous forum question I asked, I do not think they need any additional Veeam licenses on the DR site...
2 - Can Veeam backup/replication work with multiple vCentre servers - i.e. one in Production and one in DR/BC..?
3- If they want to add a 4th production vSphere Enterprise server, what options do they have for upgrading Veeam to support the additional server..?
1. Veeam does not require any licences for the DR/target hosts. Only source hosts have to be licensed.
2. Yes, of course.
3. Given that Veeam Essentials is limited to 6 sockets max, they would need to upgrade their existing keys either to Veeam Backup Management Suite or to any edition of Veeam B&R standalone.