unable to join any new computer to the domain

I have a domain controller windows server 2012 R2.
Few months back I added one additional domain controller. Additional domain controller's hardware become faulty & was shut down permanently.

Now getting server alerts that it is The DFS Replication service failed to communicate with partner ADC1 for replication
group Domain System & many similar errors.

Now I am unable to join any new computer to the domain.
getting a dialog box on device I am trying to join: The following error occurred attempting to join the domain mydomain.local. cannot complete this function.

I don't know if the absence of additional domain controller is causing this issue or something else.

Please guide to fix this issue.
Akash BansalIT ProfessionalAsked:
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Iamthecreator OMIT Admin/EE Solution GuideCommented:
The DFS replication should not be related to the problem with not being able to join computers to the domain.
Check the existing DC for the FSMO roles and seize any missing one.
Other DC was operation master in your network (FSMO roles). You need to transfer FSMO roles to your current DC.
Since you don't know what were roles assigned to old DC, I guess you should assign all operation master roles to your current DC.
Akash BansalIT ProfessionalAuthor Commented:
All the roles were assigned to the master & currently working controller.
& while adding additional domain controller I tried to assign maximum roles additional to master domain controller, in case master goes down the additional may work.

result at master & only DC:

C:\Users\Administrator>netdom query fsmo
Schema master               IBMVDC.mi.local
Domain naming master        IBMVDC.mi.local
PDC                         IBMVDC.mi.local
RID pool manager            IBMVDC.mi.local
Infrastructure master       IBMVDC.mi.local
The command completed successfully.
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Iamthecreator OMIT Admin/EE Solution GuideCommented:
Perform a meta data cleanup.

How to remove data in Active Directory after an unsuccessful domain controller demotion

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Akash BansalIT ProfessionalAuthor Commented:
Thanks Rahul.
I have deleted the ADC. I hope meta data is also removed as per the following link:

I guess that answer is yes, but, did you double check your primary DNS address on hosts that you are trying to join to domain?
Akash BansalIT ProfessionalAuthor Commented:
Wow The issue is resolved after deleting the additional domain controller as your suggestion.

Now I was able to join new computers with the domain.

Tx rahul & Predrag for helping me out.
Akash BansalIT ProfessionalAuthor Commented:
The issue is resolved after deleting the additional domain controller as per your suggestion.

Now I was able to join new computers with the domain.
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