Here’s how to get Forest Functional Level (FFL) and Domain Functional Level (DFL) of Active Directory from command line or using PowerShell:
Get Domain Functional Level using PowerShell:
Get-ADDomain | fl Name,DomainMode
Get Forest Functional Level using PowerShell:
Get-ADForest | fl Name,ForestMode
Get Forest Functional Level using dsquery:
dsquery * “CN=Partitions,CN=Configuration,DC=lab,DC=local” -scope base -attr msDS-Behavior-Version
Conversion table:
0 = Windows 2000 1 = Windows 2003 interim 2 = Windows 2003 3 = Windows 2008 4 = Windows 2008 R2 5 = Windows 2012 6 = Windows 2012 R2 7 = Windows 2016
Reference here.
Get Domain Functional Level using dsquery:
dsquery * “DC=lab,DC=local” -scope base -attr msDS-Behavior-Version ntMixedDomain
Conversion table:
0, 0 = Windows 2000 Native 0, 1 = Windows 2000 Mixed 2, 0 = Windows 2003 3, 0 = Windows 2008 4, 0 = Windows 2008 R2 5, 0 = Windows 2012
Reference here.
Get the Active Directory Schema version using dsquery:
dsquery * “CN=Schema,CN=Configuration,DC=lab,DC=local” -scope base -attr objectVersion
13 = Windows 2000 Server 30 = Windows Server 2003 RTM/SP1/SP2 31 = Windows Server 2003 R2 44 = Windows Server 2008 RTM 47 = Windows Server 2008 R2 56 = Windows Server 2012 RTM 69 = Windows Server 2012 R2 87 = Windows Server 2016
Reference for Schema objectVersion.
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