VNX - NAS connection to AD

Hello, 

I have an issue regarding connection CIFS server to AD. Event logs below.  Please advise. 

 

1. Warning: Client principal "Server_name$" not found in Kerberos realm "DOMAIN_NAME" database - KDC DC_IP

 

2. W2KDCRequestA:setDCDown(DC_IP) 

 

3. WARNING: kerberos function 'krb5_sendto_kdc' fails. Returning time error: Ticket expired (32). Client='' Server='krbtgt@DOMAIN_NAME'. LocalTime: GMT: Fri Oct 8 07:06:34 2021. RemoteTime: GMT: Fri Oct 8 07:06:34 2021. 

 

4. W2KDCRequestA:setDCDown(DC IP)