sorry for late reply,
i need to do the association wich i can only find in Unified manager GUI
from help in UM :
The Create Storage Virtual Machine Associations wizard enables partner protection applications to associate a source Storage Virtual Machine (SVM) with a destination SVM for use with SnapMirror and SnapVault relationships. Partner applications use these associations at the time of initial provisioning of destination volumes to determine which resources to select
so is there a command in powershell dataontap or cli to do this ?
Can you elaborate on what you are wanting to do? I'm not familiar with this operation.