9to5IT

Import-Module ActiveDirectory

# Set the number of days since last logon
$DaysInactive = 90
$InactiveDate = (Get-Date).Adddays(-($DaysInactive))

#-------------------------------
# FIND INACTIVE COMPUTERS
#-------------------------------
# Below are three options to find inactive computers. Select the one that is most appropriate for your requirements:

9to5IT

Import-Module ActiveDirectory

#-------------------------------
# FIND EMPTY GROUPS
#-------------------------------

# Get empty AD Groups within a specific OU
$Groups = Get-ADGroup -Filter { Members -notlike "*" } -SearchBase "OU=GROUPS,DC=testlab,DC=com" | Select-Object Name, GroupCategory, DistinguishedName

#-------------------------------

9to5IT

Import-Module ActiveDirectory

#-------------------------------
# FIND EMPTY OUs
#-------------------------------

# Get empty AD Organizational Units
$OUs = Get-ADOrganizationalUnit -Filter * | ForEach-Object { If ( !( Get-ADObject -Filter * -SearchBase $_ -SearchScope OneLevel) ) { $_ } } | Select-Object Name, DistinguishedName

#-------------------------------