In powershell I am unable to copy files using BITS Transfer that are in use by other processes (a service in my case).
Start-BitsTransfer -Source "E:/path1/dir1/file1.txt" -Destination
start-bitstransfer : The process cannot access the file because it is being used by another process.
However, Copy-Item has no such issue. Unfortunately I can't use Copy-Item because it has no option to go into low priority / background mode and it may therefore put too much strain on the servers that I'm downloading from.