[Solved] Why does the Add-LocalGroupMember cmdlet not add duplicate users to a group? — Ans: Because PowerShell throws an error on duplicates | PowerShell

PowerShell - Active Directory

Why does the Add-LocalGroupMember cmdlet not add duplicate users to a group?

ABecause it checks existing members and skips duplicates silently

BBecause PowerShell throws an error on duplicates

CBecause the group membership is stored in a database that forbids duplicates

DBecause the cmdlet removes all members before adding new ones

Step-by-Step Solution

Solution:

Step 1: Understand cmdlet behavior
Add-LocalGroupMember throws an error if the user is already a member.
Step 2: Explain duplicate handling
PowerShell checks existing members and throws an error on duplicates to prevent addition.
Final Answer:
Because PowerShell throws an error on duplicates -> Option B
Quick Check:
Duplicate add = throws error [OK]

Quick Trick: Add-LocalGroupMember throws error on duplicates [OK]

Common Mistakes:

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Why does the Add-LocalGroupMember cmdlet not add duplicate users to a group?