LDAP Query for Active-Directory Get-ADComputer in PowerShell - powershell

Question

I have the below LDAP query (from my previous question answered by Bill_Stewart) in my script that returns all computers from Get-ADComputer for Windows 7, with some exclusions.
$computersFilter= "(&(operatingSystem=*Windows 7*)(name=*-*)(!name=V7-*)(!name=*-none)(!name=*-oncall)(!name=*-blackbaud)(!name=sc-win7-1)(!name=ut-swclient-01))"
and it works fine with the below call to Get-ADComputer:
$computers= Get-ADComputer -LDAPFilter $computersFilter -Property LastLogonDate | Select-Object Name,LastLogonDate
$computers | Select Name, LastlogonDate | Export-Csv $ServiceTagsPath -NoTypeInformation
However, I want to have my query return all computers with Windows 7 and above but when I change it like so:
(&(operatingSystem=*Windows 7*)(operatingSystem=*Windows 8*)(operatingSystem=*Windows 10*)
nothing is returned into the $computers variable.
So what's the right way to write an LDAP query to return all operating system versions Windows 7 and above?

Answer 1

After some help from Rob in the comments, and some more research, I found that the correct way is to use OR, and the operator is |
like so:
$computersFilter= "(&(|(operatingSystem=*Windows 7*)"
$computersFilter+= "(operatingSystem=*Windows 8*)"
$computersFilter+= "(operatingSystem=*Windows 8.1*)"
$computersFilter+= "(operatingSystem=*Windows 10*))"
$computersFilter+= "(name=*-*)(!name=V7-*)(!name=*-none)(!name=*-oncall)"
$computersFilter+= "(!name=*-blackbaud)(!name=sc-win7-1)(!name=ut-swclient-01))"
$computers= Get-ADComputer -LDAPFilter $computersFilter
-Property * | Select-Object Name, OperatingSystem, LastLogonDate
$computers | Select Name, OperatingSystem, LastLogonDate |
Export-Csv $ServiceTagsPath -NoTypeInformation
References:
IBM LDAP Search Filter Expressions
MSDN - LDAP Query Basics