SVM DR preparation guide for CIFS doesn't work

HI

I followed the ontap 9 SVM DR preparation to create CiFS at destination but it prompts error

::> vserver cifs domain preferred-dc add -vserver svmDR -domain -preferred-dc x.x.x.x -domain my.local

Error: command failed: This operation is not permitted on a Vserver that is configured as the destination for Vserver DR.