there are trace files for development and support - so they are not simple to read do a grep for DomainJoin in the log dir at EMC C4Core and you might find it of course you need to be on the same SP so you might have to do a ssh peer
We are currently evaluating the unity and training on it using the community unityVSA.  I was able to setup an NFS nas and now I'm trying to setup the CIFS one. Everytime it was failing using the gui so to be able to try multiple different syntax I'm now using command line it is a lot faster.  The nas is created and now I'm trying to create the cifs server and every time we are getting the same errror. 0x6702173  Our AD domain is corp.transcontinental.ca and there is a container name Computers or an ou name New-Computers at the top level in which the account has right to add servers in them. Just in case there was a permission problem we have also tested with a Domain Admin account.  Here is the syntax we have used : uemcli -d 172.25.3.8 /net/nas/cifs create -server nas_6 -netbiosName idsunivsmb01 -username svc_netapp_ad -passwd xxxx -orgUnit "OU=New-Computers,DC=corp,DC=transcontinental,DC=ca" -domain corp.transcontinental.ca uemcli -d 172.25.3.8 /net/nas/cifs create -server nas_6 -netbiosName idsunivsmb01 -username svc_netapp_ad -passwd xxxx -orgUnit "CN=Computers,DC=corp,DC=transcontinental,DC=ca" -domain corp.transcontinental.ca  For all the test the result is : Storage system address: 172.25.3.8 Storage system port: 443 HTTPS connection  Operation failed. Error code: 0x6702173 The system encountered an unexpected error. Search for the error code on the support website or product forums, or contact your service provider, if available. (Error Code:0x6702173) Job ID = N-85   Currently it is hard to troubleshoot because we don't know which DC server was pick by the Unity we have a lot...  here is some questions now ::   Thanks for helping 
Error 0x6702173 trying to join AD domain