JSI Tip 5546. Windows 2000 domain controllers fail to dynamically register the GUID DNS records in the forest zone?

If a wildcard character is present in the MX record, the GUID is NOT registered. The Event log contains:

Event Type: 
Error Event 
Event Category: None 
Event ID: 5774
Date: 6/24/2002 
Time: 3:38:21 PM
User: N/A 
Computer: <ComputerName>
Description: Registration of the DNS record '0ae9d36d-1c8c-4aa4-8130-11a140138bc6._msdcs.Name.com.
600 IN CNAME <ComputerName>.Name.COM.' failed with the following error:
DNS RR set that ought not exist, does exist.
To resolve this problem, create the GUID manually. If DNS zone scavenging is enabled, select the advanced properties of the GUID record, and clear the Delete this record when it becomes stale check box.

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