Delegated domain name: abc.com.abc.com. [Broken Delegation]

Question

_{Monday, August 7, 2017 5:36 AM}

Hello,

I have my DNS server showing Delegation is broken. To troubleshoot the issue, I have checked the following:

No non-existent DNS server record is added in the forwarder or in the name server tab of DNS servers.

All Host (A) records are valid and they are properly updated. There are no DC or DNS server found as tomb stoned.

All existing DC and DNS data replication happen properly across all domain controllers.

However, I have noticed that the Delegation testing is done two times as mentioned below.

Delegated domain name: _msdcs.abc.com.

                        DNS server: dc1.abc.com. IP:192.9.203.10 [Valid]
                        DNS server: dc2.abc.com. IP:192.9.200.242 [Valid]
                        DNS server: dc3.abc.com. IP:192.9.205.58 [Valid]
                        DNS server: dc4.abc.com. IP:192.9.200.208 [Valid]
                        DNS server: dc5.abc.com. IP:192.9.210.10 [Valid]
                        DNS server: dc6.abc.com. IP:192.9.202.10 [Valid]
                        DNS server: dc6.abc.com. IP:2002:c009:ca0a::c009:ca0a [Valid]

Delegated domain name: **abc.com.abc.com.    ** (My domain name is abc.com. NOT abc.com.abc.com)

Warning: Delegation of DNS server dc1.abc.com. is broken on IP:192.9.203.10
                        Error: DNS server: dc1.abc.com. IP:192.9.203.10

                        [Broken delegation]

                        Warning: Delegation of DNS server dc2.abc.com. is broken on IP:192.9.200.242
                        Error: DNS server: dc2.abc.com. IP:192.9.200.242

                        [Broken delegation]

                        Warning: Delegation of DNS server dc3.abc.com. is broken on IP:192.9.205.58
                        Error: DNS server: dc3.abc.com. IP:192.9.205.58

                        [Broken delegation]

                        Warning: Delegation of DNS server dc4.abc.com. is broken on IP:192.9.200.208
                        Error: DNS server: dc4.abc.com. IP:192.9.200.208

                        [Broken delegation]

                        Warning: Delegation of DNS server dc5.abc.com. is broken on IP:192.9.210.10
                        Error: DNS server: dc5.abc.com. IP:192.9.210.10

                        [Broken delegation]

                        Warning: Delegation of DNS server dc6.abc.com. is broken on IP:192.9.202.10
                        Warning: Delegation of DNS server dc6.abc.com. is broken on IP:2002:c009:ca0a::c009:ca0a
                        Error: DNS server: dc6.abc.com.

                        IP:2002:c009:ca0a::c009:ca0a [Broken delegation]

Delegated domain name: abc.com.abc.com.     My domain name is abc.com. NOT abc.com.abc.com. But not sure from where is it picking this data.

Could someone please help to identify the cause.

Thanks

Jobish George

All replies (8)

_{Wednesday, August 16, 2017 5:41 AM ✅Answered}

Hi Jobish，

Just to confirm whether or not there is a “abc” folder under “abc.com\com” in DNS console.

If yes, remove “com” folder.

Also, check the result of command “nslookup abc.com.abc.com.” on the problematic DNS server.

Best Regards,

Candy

Please remember to mark the replies as answers if they help.
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_{Tuesday, August 8, 2017 7:20 AM}

Hi Jobish George,

Generally, The domain name is appended twice because it's adding it in the domain suffix search order.

Please first check the NIC IPv4 settings and be sure the DNS suffix is listed properly

In addition, you may check if there was a "abc" folder under the "com" folder in DNS Management > Forward Lookup Zones > abc.com.

For your reference:

DCDIAG DNS broken Delegation domain.domain

https://community.spiceworks.com/topic/1671293-dcdiag-dns-broken-delegation-domain-domain

Please Note: Since the web site is not hosted by Microsoft, the link may change without notice.
Microsoft does not guarantee the accuracy of this information.

Best Regards,

Candy

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If you have feedback for TechNet Subscriber Support, contact [email protected].

_{Friday, August 11, 2017 8:23 AM}

Hi Jobish George，

Just checking in to see if the information provided was helpful.

Please let us know if you would like further assistance.

Best Regards,

Candy

Please remember to mark the replies as answers if they help.
If you have feedback for TechNet Subscriber Support, contact [email protected].

_{Monday, August 14, 2017 7:51 AM}

Hello Candy,

Sorry for the delayed response. I have tried as per suggestion. But no luck.

Best Regards

Jobish

_{Monday, August 21, 2017 10:06 AM}

Hi Jobish George,

Just want to confirm the current situations.

Please feel free to let us know if you need further assistance.             

Best Regards,

Candy

Please remember to mark the replies as answers if they help.
If you have feedback for TechNet Subscriber Support, contact [email protected].

_{Friday, August 25, 2017 6:07 AM}

Hi Jobish,

Was your issue resolved?

If you resolve it using your own solution, please share your experience and solution here. It will be very beneficial for other community members who have similar questions.

If no, please reply and tell us the current situation in order to provide further help.

Best Regards,

Candy

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If you have feedback for TechNet Subscriber Support, contact [email protected].

_{Monday, August 28, 2017 5:14 AM}

Dear Candy,

Thanks and really appreciate your follow-up and support. The issue has been fixed. I have marked your suggestion as answer.

Thanks once again

Regards

Jobish George

_{Monday, August 28, 2017 7:50 AM}

Hi Jobish George,

I am glad to hear that your issue was successfully resolved. If there is anything else we can do for you, please feel free to post in the forum.

Best Regards,

Candy

Please remember to mark the replies as answers if they help.
If you have feedback for TechNet Subscriber Support, contact [email protected].