Failing to iterate over AdComputer names to get description - powershell

Question

I am using ActiveDirectory and Powershell to get the description of computers in the AD Group
However, when I try to get batch output, I get InvalidArgument error in powershell
When I use a single line:
Get-AdComputer -Filter * -Identity **COMPUTERNAME **-Properties * | Select-Object name, description
I get the correct response:
Name Description
---- -----------
COMPUTERNAME Computer description
However, when I use the this code to get a batch of results:
$UL = Get-ADGroupMember -identity "Groupname"| Select-Object name
Foreach ($i in $UL.Name)
{
$i.ToString()
Write-Host $i.GetType()
Get-AdComputer -Filter * -Identity "$i" -Properties * | Select-Object name, description
}
I keep getting this error:
Get-ADComputer : Parameter set cannot be resolved using the specified named parameters.
At C:\apps\ActiveDirectory_UserList.ps1:6 char:1
+ Get-AdComputer -Filter * -Identity "$i" -Properties * | Select-Object ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidArgument: (:) [Get-ADComputer], ParameterBindingException
+ FullyQualifiedErrorId : AmbiguousParameterSet,Microsoft.ActiveDirectory.Management.Commands.GetADComputer

Answer 1

As commented by Abraham Zinala, you cannot use both -Filter and -Identity together as these parameter sets rule eachother out giving you the error message
Parameter set cannot be resolved using the specified named parameters.
Next, Get-ADGroupMember will not just return computer objects,
but also users and other groups can be members of one particular group.
Therefore, if you want to get output for computer objects only, you will need to filter out the other object types.
Luckily, each group member has a property called objectClass. This is a string containing either 'user', 'computer' or 'group',
so it is realy quite easy to check on that:
# get all members of the group, filter with a Where-Object clause to receive only computer objects
$members = Get-ADGroupMember -Identity "Groupname" | Where-Object {$_.objectClass -eq 'computer'}
foreach ($computer in $members) {
$computer | Get-ADComputer -Properties Description | Select-Object Name, Description
}
By default, Get-ADComputer returns objects with these properties:
DistinguishedName, DNSHostName, Enabled, Name, ObjectClass, ObjectGUID, SamAccountName, SID, UserPrincipalName, so in this case you only have to ask for the extra property Description