The DNS server has encountered a critical error from the Active Directory. Check that the Active Directory is functioning properly. The extended error debug information (which may be empty) is “%1”. The event data contains the error.

Details
Product:	Windows Operating System
Event ID:	4015
Source:	DNS
Version:	5.2
Symbolic Name:	DNS_EVENT_DS_INTERFACE_ERROR
Message:	The DNS server has encountered a critical error from the Active Directory. Check that the Active Directory is functioning properly. The extended error debug information (which may be empty) is “%1”. The event data contains the error.

Explanation
The DNS Server service uses Active Directory to store DNS data, and it encountered a Lightweight Directory Access Protocol (LDAP) error while querying the directory. This error could be caused by either a time-out or a temporary interruption of service.

User Action
If this message appears repeatedly, restart the DNS Server service. For more information about DNS and DNS troubleshooting procedures, see Domain Name System(DNS)Center.