Unfortunately we don't have paid support on this server right now. We do have three domain controllers though and I have tried using all three to get this NAS on the domain. I downloaded the logs and was looking at the domain-ap.log file and noticed this.

--- joining domain (NT)-----------
Failed to join domain: Invalid configuration ("realm" set to '', should be 'xxxxxxxxxxx.net') and configuration modification was not requested
net rpc join -S DC01 -U administrator%****

I replaced my domain name with x's but it was correct in the log. Curious why the "set to" is blank and why the "should be" configuration modification was not requested.