You may be getting the following error when trying to deploy a robot via USM
'could not copy file 'nms-robot-vars-....' to target'
The target was discovered with WMI credentials and SMB v1 is not enabled on the client system.
There is an issue with this version of the ADE 8.51 probe when deploying from USM if SMB v1 is not enabled on the client system.
Use new version of ADE version 8.53