| Event Id | 4521 |
| Source | Microsoft-Windows-DNS-Server-Service |
| Description | The DNS server encountered error %1 attempting to load zone %2 from Active Directory. The DNS server will attempt to load this zone again on the next timeout cycle. This can be caused by high Active Directory load and may be a transient condition. |
| Event Information | According to Microsoft : Cause : This event is logged when DNS server encountered error attempting to load zone from Active Directory. Resolution : Check the AD DS load The DNS Server service encountered a delay while loading a zone from Active Directory Domain Services (AD DS). No further action is required if the DNS server started successfully or the zone loaded successfully. Otherwise, diagnose and correct AD DS problems that are causing an excessively high volume of operations. Verify Ensure that Event IDs 4523 and 4524 are being logged and that no events in the range 4000 to 4019 appear in the Domain Name System (DNS) event log. |
| Reference Links | Event ID 4521 from Microsoft-Windows-DNS-Server-Service |
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