[SCSensitivityLabel]: Idempotence: Cannot recreate Label groups

[1Dimitri]

Description of the issue

I have created a label group in a tenant with associated labels in a tenant.
I'm trying to recreate the group and those labels in another tenant.
I'm using the latest version of M365DSC since it fixes the AdvancedSettings creation issue previously experienced (#6973) it needs to create a group

The label group cannot be recreated as is.

• First attempt complains that ContentType cannot be empty when running Start-DSCConfiguration , whereas the export of the group has put a ContentType=@() line.
• Second attempt, when removing the ContentType line manages to create the object but as a regular label, not as a group
• Usage of the New-Label PS CmdLet directly with proper advancedsettings hashtable creates the group as a group.

Microsoft 365 DSC Version

1.26.318.1

Which workloads are affected

Security & Compliance Center

The DSC configuration

# Generated with Microsoft365DSC version 1.26.318.1
# For additional information on how to use Microsoft365DSC, please visit https://aka.ms/M365DSC
param (
)

Configuration M365TenantConfig
{
    param (
    )

    $OrganizationName = $ConfigurationData.NonNodeData.OrganizationName

    Import-DscResource -ModuleName 'Microsoft365DSC' 

    Node localhost
    {
               SCSensitivityLabel "SCSensitivityLabel-M365DSCLabels"
        {
            AdvancedSettings      = @(
                MSFT_SCLabelSetting{
                    Key = "color"
                    Value = "#3A96DD"
                }
                MSFT_SCLabelSetting{
                    Key = "isparent"
                    Value = "True"
                }
                MSFT_SCLabelSetting{
                    Key = "islabelgroup"
                    Value = "True"
                }
            );
            ApplicationId         = $ConfigurationData.NonNodeData.ApplicationId;
            CertificateThumbprint = $ConfigurationData.NonNodeData.CertificateThumbprint;
            Comment               = "See Data Classification PDF";
            # To reproduce first attempt, uncomment
            # ContentType           = @();
            DisplayName           = "M365DSCLabelgroup";
            Ensure                = "Present";
            LocaleSettings        = @(
                MSFT_SCLabelLocaleSettings{
                    LabelSettings = @(
                        MSFT_SCLabelSetting{
                            Key = "default"
                            Value = "M365DSCLabelgroup"
                        }
                    )
                    LocaleKey = "displayName"
                }
                MSFT_SCLabelLocaleSettings{
                    LabelSettings = @(
                        MSFT_SCLabelSetting{
                            Key = "default"
                            Value = "Predefined Labels at the Company Level. Refer to the documentation you have received to know more about their differences"
                        }
                    )
                    LocaleKey = "tooltip"
                }
            );
            Name                  = "M365DSCLabels";
            Priority              = 16;
            TenantId              = $OrganizationName;
            Tooltip               = "Predefined Labels at the Company Level. Refer to the documentation you have received to know more about their differences";
        }
    }
}

M365TenantConfig -ConfigurationData .\ConfigurationData.psd1

Verbose logs showing the problem

First attempt

PowerShell DSC resource MSFT_SCSensitivityLabel  failed to execute Set-TargetResource functionality with error
message: |Microsoft.Exchange.Management.UnifiedPolicy.InvalidMipLabelContentTypeException|The content type
'None' is invalid.
    + CategoryInfo          : InvalidOperation: (:) [], CimException
    + FullyQualifiedErrorId : ProviderOperationExecutionFailure
    + PSComputerName        : localhost

Second Attempt

Creating Label {M365DSCLabels} with:
{
    "LocaleSettings":  [
                           "{\r\n    \"localeKey\":  \"displayName\",\r\n    \"Settings\":  [\r\n
      {\r\n                         \"Key\":  \"default\",\r\n                         \"Value\":
\"M365DSCLabelgroup\"\r\n                     }\r\n                 ]\r\n}",
                           "{\r\n    \"localeKey\":  \"tooltip\",\r\n    \"Settings\":  [\r\n
  {\r\n                         \"Key\":  \"default\",\r\n                         \"Value\":  \"Predefined
Labels at the Company Level. Refer to the documentation you have received to know more about their
differences\"\r\n                     }\r\n                 ]\r\n}"
                       ],
    "Tooltip":  "Predefined Labels at the Company Level. Refer to the documentation you have received to know
more about their differences",
    "Comment":  "See Data Classification PDF",
    "DisplayName":  "M365DSCLabelgroup",
    "AdvancedSettings":  {
                             "color":  "#3A96DD",
                             "isparent":  "True",
                             "islabelgroup":  "True"
                         },
    "Name":  "M365DSCLabels"
}

Powershell working command

New-Label -AdvancedSettings @{'isparent'='True';'islabelgroup'='True'} -Comment "See DataClassification PDF" -DisplayName "PSLabelsTest"  -Name "PSLabelsTest" -Tooltip "Predefined Labels at the Company Level. Refer to the documentation you have received"

Environment Information + PowerShell Version

OsName               : Microsoft Windows Server 2022 Datacenter
OsOperatingSystemSKU : DatacenterServerEdition
OsArchitecture       : 64-bit
WindowsVersion       : 2009
WindowsBuildLabEx    : 20348.1.amd64fre.fe_release.210507-1500
OsLanguage           : en-US
OsMuiLanguages       : {en-US}

PSVersion                      5.1.20348.4294
PSEdition                      Desktop
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}
BuildVersion                   10.0.20348.4294
CLRVersion                     4.0.30319.42000
WSManStackVersion              3.0
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1