VM: Server 2008 Standard R2 with vCenter Server 4.1 installed running on VMware Workstation 7.1. I'm pretty confident I've done my homework on the required port settings that have to be opened up for this in windows firewall. 443, 902
The destination host is an ESXi 4.1 server which the vCenter Server 4.1 VM is already managing.
I install vCenter Converter Standalone client on the vCenter Server 4.1 VM and attempt to push it up to my ESXi 4.1 box.
FAILED: Unable to create a VSS snapshot of the source volume(s). Error code: 2147754754 (0x80042302)
Resourcing that error online points me toward Windows Firewall blocking a port, but again I'm pretty sure I've opened all the requisite ports.