Why OU Structure Matters
A well-designed OU structure makes it easier to apply Group Policies, delegate permissions, and manage objects. Poor structure leads to administrative nightmares.
Recommended OU Structure
Domain Root
??? Domain Controllers (built-in)
??? Computers
?   ??? Workstations
?   ??? Laptops
?   ??? Servers
??? Users
?   ??? IT Department
?   ??? HR Department
?   ??? Sales Department
?   ??? Executives
??? Groups
?   ??? Security Groups
?   ??? Distribution Groups
??? Service Accounts
Create OUs with PowerShell
New-ADOrganizationalUnit -Name "Computers" -Path "DC=company,DC=com"
New-ADOrganizationalUnit -Name "Workstations" -Path "OU=Computers,DC=company,DC=com"
New-ADOrganizationalUnit -Name "Laptops" -Path "OU=Computers,DC=company,DC=com"
New-ADOrganizationalUnit -Name "Servers" -Path "OU=Computers,DC=company,DC=com"
Best Practices
- Separate by type: Users, Computers, Groups in different top-level OUs
 - Geographic separation: If multi-site, use location-based OUs
 - Don't go too deep: Maximum 3-4 OU levels
 - Service accounts separate: Keep them in dedicated OU with restricted GPOs
 - Block inheritance carefully: Only block when absolutely necessary
 
Common Mistakes to Avoid
- Creating OUs for every team (use groups instead)
 - Too many nested levels
 - Mixing computer types in same OU
 - Not documenting your structure
 
Moving Objects Between OUs
Move-ADObject -Identity "CN=JohnDoe,OU=OldOU,DC=company,DC=com" -TargetPath "OU=NewOU,DC=company,DC=com"
Delegate Permissions
Right-click OU ? Delegate Control ? Add users ? Select tasks (Create/Delete users, Reset passwords, etc.)
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