Get members of a group:

get-adgroupmember -identity <GROUPNAME>

Get a list of user’s “PasswordLastSet” field has a date greater than 31/01/2000 along with their usernames and email addresses:

get-aduser -filter * -Properties PasswordLastSet | where {$_.passwordLastSet -ge [DateTime] "01/31/2000 00:01 AM"} | Select-Object Name, PasswordLastSet, SamAccountName, EmailAddress

Compare two CSV files for differences:

$refCSV = import-csv .\Source.csv 
$compCSV = import-csv .\Reference.csv 
compare-object -referenceobject $refCSV -DifferenceObject $compCSV | foreach { $_.InputObject}

Iterate over a text file of usernames (one per line) and query AD for some values, printing the useraccount’s containing OU in a easily readable form and output to results.csv:

$usersaffected = "c:\tmp\listofusernames.txt"
$output = foreach ($line in get-content $usersaffected) {get-aduser $line -Properties * | Select @{l='OU';e={$_.DistinguishedName.split(',')[1].split('=')[1]}},"whenCreated", "emailaddress", "passwordLastSet", "distinguishedName"}
$output | export-csv -path c:\tmp\results.csv