Content Replication - No response from agent on target device

Ivanti Endpoint Manager 2017.3 = EPM 2017.3

I have setup a preferred server with a share same name as share on the source

All the credential tests worked during setup of Preferred Server, Sources,

When I select "Start content replication now"    i get "Content Replication" "Requesting" then it changes to "Content Replication" "Failed" "No response from agent on target device"

Hardware and Software Scans work

Remote control works

Scheduled tasks to send update to device works.

I wanted to put this in "Online Support Discussion Group" but I don't have access.