Get Active Directory user info using ADSI with no dependency on native AD Cmdlets

get-myADUserInfo.ps1

Function Get-myADUserInfo
{
    [CmdletBinding()]

    param 
    (
        [string[]]$Username
    )

    Begin 
    {
        try
        {
            $NamingContext = (([ADSI]"LDAP://RootDSE").DefaultNamingContext)[0]
            Write-Verbose "Active Directory Forest Configuration container DN is $NamingContext"
        }
        catch
        {
            $NamingContext = $null
            Write-Error 'unable to connect to Active Directory' 
        }
    }

    Process 
    {
        if ($NamingContext)
        {
            foreach ($v in $Username)
            {
                try
                {
                
                    $SearchBase = [ADSI]"LDAP://$NamingContext"

                    $Filter = "(sAMAccountName=$v)"
                    $Properties = @("cn", "name", "displayName", 'mail')

                    $Searcher = [System.DirectoryServices.DirectorySearcher]::new($SearchBase, $Filter, $Properties, [System.DirectoryServices.SearchScope]::Subtree)

                    $SearchResults = $Searcher.FindAll() 

                    $info = @{
                        samAccountName = $v; 
                        cn             = ($SearchResults.Properties['cn'])[0];
                        displayName    = ($SearchResults.Properties['displayName'])[0];
                        mail           = ($SearchResults.Properties['mail'])[0];
                    }
                }
                catch
                {
                    $info = [pscustomobject][ordered]@{
                        samAccountName = $v; 
                        cn             = $null 
                        displayName    = $null 
                        mail           = $null 
                    }
                }

                $info 
            }
        }
    }

    End
    {

    }
}