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Unable to join machines to the domain. Error Message “The Specified User already exists”

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unable to join machines to the domain
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Unable to join machines to the domain. Error Message “The Specified User already exists”

You are trying to join a computer to the Active Directory domain and getting the below error:

Error Description: Unable to join machines to the domain. Error Message “The Specified User already exists”

PROBLEM DESCRIPTION :

We were not able to join the machines to the domain and got the following error message:

“The Specified User already exists”

In the AD Users and Computers we were not able to “Find” any such account in the entire directory as the disabled accounts existed in a Non Built-in container.

Resolution:

assuming FQDN= abc.xyz.ad

We took the LDIFDE dump for the entire domain partition using the command:

ldifde -f out.txt -d "dc=abc,dc=xyz,dc=ad" 

We now found multiple disabled accounts present under a Non-Built-in container in the AD.

We deleted the machine accounts from the AD container and then forced the replication using the command:

repadmin /syncall /AeP

We have now successfully joined all the machines to the domain.

The issue is resolved.

Reference:

http://support.microsoft.com/kb/237677

Ravi Chopra
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