troubleshooting Question

DNS server TEST: Delegations (Del) FAILED IP:<Unavailable> [Missing glue A record]

Avatar of Senior IT System Engineer
Senior IT System EngineerFlag for Australia asked on
Windows OSActive DirectoryDNSMicrosoft Server OS
7 Comments7 Solutions1372 ViewsLast Modified:
Hi All,

Can anyone here please share some way to fix the DNS Delegation test failure ?

TEST: Delegations (Del)
   Error: DNS server: IP:<Unavailable> [Missing glue A record]

Because when I execute the command dcdiag /test:DNS in both my newly deployed and existing domain controller, it is FAIL on the Delegation test only.

I've checked:
Ping is succesful for PRODDC26-VM (server still exist and running as another DC/GC & DNS in another AD site).
There is A record in the DNS forward lookup domain for PRODDC26-VM
There is another NS record under the "greyed out" _msdcs folder with NS (same as parent folder) static pointing to
     _msdcs --> greyed out.

What is this delegation is for and can I safely delete it ? What's the impact ?

Join our community to see this answer!
Unlock 7 Answers and 7 Comments.
Start Free Trial
Learn from the best

Network and collaborate with thousands of CTOs, CISOs, and IT Pros rooting for you and your success.

Andrew Hancock - VMware vExpert
See if this solution works for you by signing up for a 7 day free trial.
Unlock 7 Answers and 7 Comments.
Try for 7 days

”The time we save is the biggest benefit of E-E to our team. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange.

-Mike Kapnisakis, Warner Bros