DNS Non-authoritative answer

I have installed ehcp successfully but I have the problem regarding the DNS Server. After creating the domain name i checked my domain with nslookup command it show like this:

C:\>nslookup abc.com
Server: dns.xyz.com
Address: xxx.xxx.xxx.xxx

Non-authoritative answer:
Name: abc.com
Address: xxx.xxx.xxx.xxx

Why it shows Non-authoritative answer? If you have solution then please......

mine is also like that..
I dont know what it shows like that.. it works..
I dont think that is a problem.. your dns will work..