I know this is a stretch , but looking for someone pretty skilled or can point me in right direction for understanding some issues I’m running into with
Vsphere 5.5 and Veeam 7 and a DC, >=)

Aka, DC will not backup in current state,
Can cross domain cause this ?
AKA Veeam machines on Domain A, DC on domain B , both in same rack
I setup its own batch job using Domain B admin account and gets bout 2 mins in before tossing the error,

Or is there some VSS I need to insure working on the server ?

Do you have a packet capture between the two devices? I’d be happy to give it a look.