How to export specific users from a domain using Powershell?

Question

PowerShell

Good afternoon guys!
There was such task, to export users from software UserGate. Find them in the local domain by last name, export and transfer to another domain.
Using python, I parsed the xml file usergate. Got surnames, now you need to find these surnames in the domain and import them into cvs. Unfortunately, I don't know powershell at all. That's why I'm asking for a little advice.

$DB = cat .\user.txt
foreach ($i in $DB)
{
$Users = Get-ADUser -Filter {Surname -eq $i} -Properties *

}

Thus, I was able to find users, but I don’t know how to correctly add everything in order to export each user to csv.
I ask for your help))

Answer 1

$DB = cat .\user.txt
foreach ($i in $DB)
{
Get-ADUser -Filter {Surname -eq $i} -Properties * | export-csv c:\test\csvfile.csv -append -notypeinformation
}
works?

Answer 2

notype information