SCCM Collection affinity script

PowerShell Help
1

I’ve written the below script to get user and device affinity information. The script checks to see if its a user or device collection and switch runs against the right commands. It works, but for improvement purposes could i done something more efficiently ?

Function Get-CollectionAffinityData {

[cmdletbinding()]

param (     
    
    [Parameter(Mandatory=$true)]
    [ValidateNotNull()]
    [ValidateNotNullOrEmpty()]
    [string]
    $Collection
)


$script:Collection = Get-CMCollection -Name $Collection

switch ($script:Collection.CollectionType) 
    {
    
        0 { "Not supported in this script" }
  
        1 { $users = Get-CMUser -CollectionName $script:Collection.name
                        
                        $script:array  = @()
                        
                        $users | foreach {

                        $data = New-Object PSObject -Property @{

                            PrimaryUser =  $_.SMSID
                            PrimaryDevices = if (($_ = Get-CMUserDeviceAffinity -UserName $_.SMSID).ResourceName -eq $null) { '$Null' } else { $_.ResourceName }
                            LastClientCheckDate =  ForEach ($y in $_.ResourceName ) { ( Get-CMDevice -Name $y ).LastClientCheckTime.ToShortDateString() }                     
                                
                            }   
                        $script:array += $data
                            }
    
         } #End of switch "1"
  
       2 { $Devices = Get-CMDevice -CollectionName $script:Collection.Name
                        
                        $script:array = @()

                        $users = $devices | foreach { $_.UserDomainName + "\" + $_.UserName } | foreach { Get-CMUser -Name $_ }
                        
                        $users | foreach {   
                                                                           
                        $data = New-Object PSObject -Property @{

                            PrimaryUser =  $_.SMSID
                            PrimaryDevices = if (($_ = Get-CMUserDeviceAffinity -UserName $_.SMSID).ResourceName -eq $null) { '$Null' } else { $_.ResourceName }
                            LastClientCheckDate =  ForEach ($y in $_.ResourceName ) { ( Get-CMDevice -Name $y ).LastClientCheckTime.ToShortDateString() }                     
                            }    
                        $script:array += $data
                            } 

        } #End of switch "2"

    }

echo $script:array 

}#End of function

output looks like this:

PrimaryDevices LastClientCheckDate PrimaryUser

{DEVICE1, DEVICE2} {20/04/2016, 08/03/2016} DOMAIN\USER1, DOMAIN\USER2
DEVICE3 01/03/2016 DOMAIN\USER3

2

There may be some efficiency improvements based on your $devices switch doing a get-CMDevice for the collection and then in the foreach doing another get-CMDevice. But if it is working your are that the point where you would need to start measuring the impact of changes and digging into the data the is available in your current objects.

3

Thank you jonathan, I will take a look. Appricate your reply.