Artifacts will be deployed in the specified output directory.
The remote location must be accessible through the build machine (master/slave node).
If you want to have the ability to download deployed artifacts through the Jenkins dashboard, the location must be accessible from the Jenkins master.
Make sure the Jenkins process have the right permissions to write to the remote location.
For example with a shared NFS storage, '/nfs/build/deploy/${BUILD_ID}' can be a valid value on an Unix machine.