Recursively check active computers in a computer group based on `LastLogonDate`

Get-TotalActiveComputers.ps1

# Define the group name
$ADGroupName = "My-AD-Computer-Group"

# Get the current date and calculate the threshold for last logon (365 days ago)
$DaysThreshold = 365
$LastLogonCutoff = (Get-Date).AddDays(-$DaysThreshold)

# Function to recursively get members of a group, including nested groups
function Get-ADGroupMembersRecursive {
    param (
        [string]$GroupName
    )
    $Members = Get-ADGroupMember -Identity $GroupName -Recursive | Where-Object { $_.objectClass -eq "computer" }
    return $Members
}

# Get all computers in the AD group (including nested)
$Computers = Get-ADGroupMembersRecursive -GroupName $ADGroupName

# Get last logon date for each computer and filter by last 365 days
$ActiveComputers = $Computers | ForEach-Object {
    $Computer = Get-ADComputer -Identity $_.DistinguishedName -Properties LastLogonDate
    if ($Computer.LastLogonDate -gt $LastLogonCutoff) {
        $Computer
    }
}

# Output the final count
$ActiveComputers.Count