Find User SID using Powershell

These snippets allow to find a local or AD user SID or get the username from the SID

	<#
	.SYNOPSIS
	Finds SID for a local user account.
	.DESCRIPTION
	Returns the SID of a local user account. To find the SID for an active directory user use
	findADSID instead
	.PARAMETER $user
	The user for which to find the SID
	.EXAMPLE
	PS C:\> findLocalSID -user Guest
	.INPUTS
	System.String
	.OUTPUTS
	System.String
	.LINK
	about_functions_advanced
	.LINK
	about_comment_based_help
	#>
	function findLocalSID($user) {
	$Objuser = New-Object System.Security.Principal.NTAccount($user)
	$strSID = $Objuser.Translate([System.Security.Principal.SecurityIdentifier])
	return $strSID.Value
	}
	<#
	.SYNOPSIS
	finds the SID for an Active directory user
	.DESCRIPTION
	returns a string in the form of an sid
	.PARAMETER $domain
	the domain the user belongs to
	.PARAMETER $user
	the domain user
	.EXAMPLE
	PS C:\> findADSID -domain <domain> -user <user>
	.INPUTS
	System.String
	.OUTPUTS
	System.String
	.LINK
	about_functions_advanced
	.LINK
	about_comment_based_help
	#>
	function findADSID{
	param(
	[Parameter(Mandatory = $true)]
	$domain,
	[Parameter(Mandatory = $true)]
	$user)
	$Objuser = New-Object System.Security.Principal.NTAccount($domain,$user)
	$strSID = $Objuser.Translate([System.Security.Principal.SecurityIdentifier])
	return $strSID.Value
	}
	<#
	.SYNOPSIS
	find User id based on SID Value
	.DESCRIPTION
	returns user name
	.PARAMETER $sid
	sid value (not quoted)
	.EXAMPLE
	PS C:\> findUserFromSID S-1-5-21-2213100911-2073097868-631715938-506
	.INPUTS
	System.String
	.OUTPUTS
	System.String
	.NOTES
	Additional information about the function goes here.
	.LINK
	about_functions_advanced
	.LINK
	about_comment_based_help
	#>
	function findUserFromSID{
	param(
	[Parameter(Mandatory = $true)]
	$sid
	)
	$objSID = New-Object System.Security.Principal.SecurityIdentifier($sid)
	$Objuser = $objSID.Translate([system.Security.Principal.NTAccount])
	return $Objuser.Value
	}

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