Method invocation failed because [System.Management.Automation.PSObject] doesn’t contain a method named ‘op_Addition’.

While constructing a PowerShell script for gathering information about Distribution Lists within a customers environment, I ran into the following error

Method invocation failed because [System.Management.Automation.PSObject] doesn’t contain a method named ‘op_Addition’. 

This error was being generated by a missing array within my PowerShell code

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
# Call Distribution Lists

$dist = @(Get-DistributionGroup -resultsize unlimited)



# Start Transcript

Start-Transcript -Path $env:USERPROFILE\desktop\DLsandMember.txt



# Report on Distribution List

foreach ($dl in $dist)

{

  

  $count =@(Get-DistributionGroup $dl.samaccountname).count

  $report = New-Object -TypeName PSObject

  $report | Add-Member -MemberType NoteProperty -Name 'Group Name' -Value $dl.Name

  $report | Add-Member -MemberType NoteProperty -Name 'samAccountname' -Value $dl.samaccountname

  $report | Add-Member -MemberType NoteProperty -Name 'Group Type' -Value $dl.grouptype

  $report | Add-Member -MemberType NoteProperty -Name 'DN' -Value $dl.distinguishedName

  $report | Add-Member -MemberType NoteProperty -Name 'Manager' -Value $dl.managedby

  $report | Add-Member -MemberType NoteProperty -Name 'Member Depart Restriction' -Value $dl.memberdepartrestriction

  $report | Add-Member -MemberType NoteProperty -Name 'Member Join Restriction' -Value $dl.memberjoinrestriction

  $report | Add-Member -MemberType NoteProperty -Name 'PrimarySMTPAddress' -Value $dl.primarysmtpaddress

  $report | Add-Member -MemberType NoteProperty -Name 'EmailAddress' -Value $dl.emailaddresses

  $report | Add-Member -MemberType NoteProperty -Name 'GrantSendOnBehalfto' -Value $dl.GrantSendOnBehalfto

  $report | Add-Member -MemberType NoteProperty -Name 'EmailAddressPolicyEnabled' -Value $dl.EmailAddressPolicyEnabled

  $report | Add-Member -MemberType NoteProperty -Name 'Number of Members' -Value $count

  Write-Host ('INFO: {0} has {1} members' -f $dl.name, ($count))

 

  $reportoutput += $report

}



# Stop Transcript

Stop-Transcript

By adding the following lines to my above script I was able to successful export the required information into an Array and dump out to CSV.

1
2
# Array

$reportoutput=@()

Regards

The Author – Blogabout.Cloud