New-M365DSCDeltaReport: Getting `You cannot call a method on a null-valued expression` and empty report on PowerShell 7

[adhodgson1]

Description of the issue

I'm trying to identify if PowerShell 7 usage in our environment will decrease the time it will take to run through our pipeline on a large set of AAD groups (over 4000).

I run the command: Export-M365DSCConfiguration -MaxProcesses 8 -Components AADGroup -Path output/exports/AAD -FileName AADGroup.ps1 -CertificateThumbprint $thumbprint -TenantId $tenantName -ApplicationId $applicationID

I get the exported groups, so then run the command: New-M365DSCDeltaReport -Verbose -Source configurations\AAD\AADGroup.ps1 -Destination output/exports/AAD/AADGroup.ps1 -Type HTML -OutputPath output/deltas/AAD/AADGroup.html

I get the following output: VERBOSE: Obtaining Delta between the source and destination configurations VERBOSE: Loading file 'configurations/AAD\AADGroup.ps1' VERBOSE: Loading file 'output/exports/AAD/AADGroup.ps1' Error: You cannot call a method on a null-valued expression. Error: You cannot call a method on a null-valued expression. Error: You cannot call a method on a null-valued expression. [I think I get one of these per group in the source file]

Microsoft 365 DSC Version

1.24.214.3

Which workloads are affected

other

The DSC configuration

No response

Verbose logs showing the problem

No response

Environment Information + PowerShell Version

OsName               : Microsoft Windows 11 Enterprise
OsOperatingSystemSKU : EnterpriseEdition
OsArchitecture       : 64-bit
WindowsVersion       : 2009
WindowsBuildLabEx    : 22621.1.amd64fre.ni_release.220506-1250
OsLanguage           : en-GB
OsMuiLanguages       : {en-GB, en-US}

Name                           Value
----                           -----
PSVersion                      7.4.1
PSEdition                      Core
GitCommitId                    7.4.1
OS                             Microsoft Windows 10.0.22631
Platform                       Win32NT
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0

[andikrueger]

Could you share some sample data and is this also the case within PS5?

[adhodgson1]

This is working using PowerShell 5.

Here is the exported group sample:

# Generated with Microsoft365DSC version 1.24.214.3
# For additional information on how to use Microsoft365DSC, please visit https://aka.ms/M365DSC
param (
)

Configuration AADGroup
{
    param (
    )

    $OrganizationName = $ConfigurationData.NonNodeData.OrganizationName

    Import-DscResource -ModuleName 'Microsoft365DSC' -ModuleVersion '1.24.214.3'

    Node localhost
    {
        AADGroup "AADGroup-REDACTED"
        {
            ApplicationId         = $ConfigurationData.NonNodeData.ApplicationId;
            CertificateThumbprint = $ConfigurationData.NonNodeData.CertificateThumbprint;
            DisplayName           = "REDACTED";
            Ensure                = "Present";
            GroupTypes            = @();
            Id                    = "REDACTED";
            MailEnabled           = $False;
            MailNickname          = "REDACTED";
            MemberOf              = @();
            Members               = @();
            Owners                = @();
            SecurityEnabled       = $True;
            TenantId              = $OrganizationName;
        }
    }
}

AADGroup -ConfigurationData .\ConfigurationData.psd1

Here is the source file sample:

param (
    [Parameter(Mandatory = $true)]
    [string]$ApplicationID,
    [Parameter(Mandatory = $true)]
    [string]$CertificateThumbprint,
    [Parameter(Mandatory = $true)]
    [string]$TenantName,
    [Parameter(Mandatory = $true)]
    [string]$OutputDirectory
)

Configuration AADGroup
{
    param (
    )

    Import-DscResource -ModuleName 'Microsoft365DSC'

    Node localhost
    {
        AADGroup "AADGroup-REDACTED"
        {
            ApplicationId         = $ApplicationId;
            CertificateThumbprint = $CertificateThumbprint;
            TenantId              = $TenantName;
            DisplayName           = "REDACTED";
            Ensure                = "Present";
            GroupTypes            = @();
            MailEnabled           = $False;
            MailNickname          = "TCS_Alexander_House";
            MemberOf              = @();
            SecurityEnabled       = $True;
        }
    }
}

AADGroup -OutputPath $OutputDirectory