In a Windows environment, managing user and group memberships is a critical task for system administrators. One common requirement is to remove a user from a local group. This can be efficiently accomplished using the Remove-LocalGroupMember cmdlet in PowerShell. This cmdlet is part of the Microsoft.PowerShell.LocalAccounts module and is available in Windows 10 and Windows Server 2016 or later. Understanding how to use this cmdlet helps maintain system security and manage user access effectively.

Examples:

1. Removing a Single User from a Local Group:

   Suppose you want to remove a user named "JohnDoe" from the "Administrators" group. You can achieve this with the following PowerShell command:

   Remove-LocalGroupMember -Group "Administrators" -Member "JohnDoe"

2. Removing Multiple Users from a Local Group:

   If you need to remove multiple users, such as "JohnDoe" and "JaneSmith," from the "Administrators" group, you can use the command below:

   Remove-LocalGroupMember -Group "Administrators" -Member "JohnDoe", "JaneSmith"

3. Removing a User from a Group Using a Variable:

   You can also use variables to specify the group and members. This is useful for scripting and automation:

   $group = "Administrators"
   $members = "JohnDoe", "JaneSmith"
   Remove-LocalGroupMember -Group $group -Member $members

4. Removing a Domain User from a Local Group:

   To remove a domain user from a local group, you need to specify the domain name along with the username. For example, to remove "JohnDoe" from the "Contoso" domain:

   Remove-LocalGroupMember -Group "Administrators" -Member "Contoso\JohnDoe"

5. Error Handling:

   It's a good practice to include error handling in your scripts. Here’s an example that uses Try and Catch blocks to handle potential errors:

   Try {
      Remove-LocalGroupMember -Group "Administrators" -Member "JohnDoe" -ErrorAction Stop
      Write-Host "User removed successfully."
   }
   Catch {
      Write-Host "An error occurred: $_"
   }

By mastering the Remove-LocalGroupMember cmdlet, you can efficiently manage user access and maintain the security of your Windows systems. This cmdlet is a powerful tool in the arsenal of any Windows system administrator.