Netlogon and sysvol folder share error

Hi,

We have a domain, and 3 domain controllers. and all DCs are Windows Server 2012 OS.

DC01 and DC02 are in one site and DC03 is in another site.
DC02 is a role box
on DC03 we are getting below error message while running dcdiag command

Starting test: NetLogons        
 Unable to connect to the NETLOGON share! (\\DC03\netlogon)  
 [DC03] An net use or LsaPolicy operation failed with error
 67, The network name cannot be found..  
 ......................... DC03 failed test NetLogons     

and net share result:-

Share name   Resource                        Remark

-------------------------------------------------------------------------
C$           C:\                             Default share
D$           D:\                             Default share
E$           E:\                             Default share
IPC$                                         Remote IPC
ADMIN$       C:\Windows                      Remote Admin
The command completed successfully.

Please suggest..

Thanks in Advance

Abhishek