Same with me too. really useful option. thanks

Is the compressed backup from litespeed is 650GB? hope you are not talking about native backup..

how long does the job run before it fails?

how big is the backup? how long does it take to back when it is successful or if you back it up locally...

It definitely looks like a permissions issue on the destination folder....

Can you add\remove a file to that UNC path as that windows user?

Un tick 'Verify integrity of the backup after completion' and try...

Thanks for your suggestion. Application is being accessed from a Citrix server. Tt is returning same host_name for most of the users.

Any other ideas please??