That link is broke you provided. You might want to fix that.
I seem to be going though the same steps.
My tunnel is created, My CIFS Server is created. I know through trial and error you cannot have that same Vserver run CIFS and have a computer account create a computer with the same time. The Docs never really say when a CIFS Server is created it actually creates a computer account. Via this error in 9.5. A CIFS server for this Vserver already exists. Having both a CIFS server and an Active Directory account for the same Vserver is not supported. ( Cause it already created it ) Use the "vserver cifs delete" command to delete the existing CIFS server ( ACCOUNT) and try the command again. With the command that failed being. create -vserver XXXXNASDADAD -account-nameXXXXNASDADAD -domain something.something.net -ou CN . Its seems the people that write on the docs and the people that do it are once removed. ( Are different folks.)