This tutorial is for ADDS knowledge to understand the essential role that must be online for Domain Controller to join successfully.
The test consists of pre-configured domain with child domain as follows:
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Domain Controller
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FSMO Roles
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| DC1.test.local | PDC Emulator Infrastructure Master RID Master |
| DC2.test.local | Domain Naming Master Schema Master |
| DC3.corp.test.local | PDC Emulator Infrastructure Master RID Master |
| DC4.corp.test.local | GC |
In this test, I will join new server DC5 under child domain “corp.test.local”.
First, we need to check FSMO roles by logging the current DC and execute ntdsutil command:
ntdsutil Roles Connections “Connect to server %LogonServer%” Quit “Select Operation Target” “List roles for conn server” Quit Quit Quit
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DC
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NTDSUTIL Output
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DC1
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ntdsutil: Roles
fsmo maintenance: Connections
server connections: Connect to server \\DC1
Binding to \\DC1 …
Connected to \\DC1 using credentials of locally logged on user.
server connections: Quit
fsmo maintenance: Select Operation Target
select operation target: List roles for conn server
Server “\\DC1” knows about 5 roles
Schema – CN=NTDS Settings,CN=DC2,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=test,DC=local
Naming Master – CN=NTDS Settings,CN=DC2,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=test,DC=local
PDC – CN=NTDS Settings,CN=DC1,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=test,DC=local
RID – CN=NTDS Settings,CN=DC1,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=test,DC=local
Infrastructure – CN=NTDS Settings,CN=DC1,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=test,DC=local
select operation target: Quit
fsmo maintenance: Quit
ntdsutil: Quit
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DC2
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ntdsutil: Roles
fsmo maintenance: Connections
server connections: Connect to server \\DC2
Binding to \\DC2 …
Connected to \\DC2 using credentials of locally logged on user.
server connections: Quit
fsmo maintenance: Select Operation Target
select operation target: List roles for conn server
Server “\\DC2” knows about 5 roles
Schema – CN=NTDS Settings,CN=DC2,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=test,DC=local
Naming Master – CN=NTDS Settings,CN=DC2,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=test,DC=local
PDC – CN=NTDS Settings,CN=DC1,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=test,DC=local
RID – CN=NTDS Settings,CN=DC1,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=test,DC=local
Infrastructure – CN=NTDS Settings,CN=DC1,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=test,DC=local
select operation target: Quit
fsmo maintenance: Quit
ntdsutil: Quit
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DC3
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ntdsutil: Roles
fsmo maintenance: Connections
server connections: Connect to server \\DC3
Binding to \\DC3 …
Connected to \\DC3 using credentials of locally logged on user.
server connections: Quit
fsmo maintenance: Select Operation Target
select operation target: List roles for conn server
Server “\\DC3” knows about 5 roles
Schema – CN=NTDS Settings,CN=DC2,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=test,DC=local
Naming Master – CN=NTDS Settings,CN=DC2,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=test,DC=local
PDC – CN=NTDS Settings,CN=DC3,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=test,DC=local
RID – CN=NTDS Settings,CN=DC3,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=test,DC=local
Infrastructure – CN=NTDS Settings,CN=DC3,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=test,DC=local
select operation target: Quit
fsmo maintenance: Quit
ntdsutil: Quit
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DC4
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ntdsutil: Roles
fsmo maintenance: Connections
server connections: Connect to server \\DC4
Binding to \\DC4 …
Connected to \\DC4 using credentials of locally logged on user.
server connections: Quit
fsmo maintenance: Select Operation Target
select operation target: List roles for conn server
Server “\\DC4” knows about 5 roles
Schema – CN=NTDS Settings,CN=DC2,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=test,DC=local
Naming Master – CN=NTDS Settings,CN=DC2,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=test,DC=local
PDC – CN=NTDS Settings,CN=DC3,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=test,DC=local
RID – CN=NTDS Settings,CN=DC3,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=test,DC=local
Infrastructure – CN=NTDS Settings,CN=DC3,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=test,DC=local
select operation target: Quit
fsmo maintenance: Quit
ntdsutil: Quit
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Test Table
Test: Join new server DC5 into Child Domain corp.test.local on DC3 and DC3 is unavailable
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Set DC to Offline
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Result
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| DC1.test.local | Pass |
| DC2.test.local | Pass |
| DC3.corp.test.local | Fail
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