export of MSFT_AADApplicationOnPremisesPublishingSingleSignOnSetting broken if kerberosSignOnSettings = $null

[slaurentpco]

Description of the issue

When I export AADApplication with version 1.25.129.3, I get the following config (excerpt):

        AADApplication "AADApplication-REDACTED"
        {
...
            OnPremisesPublishing    = MSFT_AADApplicationOnPremisesPublishing{
                externalAuthenticationType = 'aadPreAuthentication'
                isPersistentCookieEnabled = $False
                internalUrl = 'https://REDACTED/'
                isTranslateHostHeaderEnabled = $True
                singleSignOnSettings = MSFT_AADApplicationOnPremisesPublishingSingleSignOnSetting{
                    singleSignOnMode = 'none'
                    kerberosSignOnSettings = $null

                }
..

Then when I try to call ConvertTo-DSCObject on the resulting M365TenantConfig.ps1 file, I get this error:

Unable to find type [Instance].

If I remove the line kerberosSignOnSettings = $null then it's OK.

My guess is that Export-M365DSCConfiguration should not write this line in M365TenantConfig.ps1...

Microsoft 365 DSC Version

1.25.129.3

Which workloads are affected

Azure Active Directory (Entra ID)

The DSC configuration

AADApplication "AADApplication-REDACTED"
        {
...
            OnPremisesPublishing    = MSFT_AADApplicationOnPremisesPublishing{
                externalAuthenticationType = 'aadPreAuthentication'
                isPersistentCookieEnabled = $False
                internalUrl = 'https://REDACTED/'
                isTranslateHostHeaderEnabled = $True
                singleSignOnSettings = MSFT_AADApplicationOnPremisesPublishingSingleSignOnSetting{
                    singleSignOnMode = 'none'
                    kerberosSignOnSettings = $null

                }
..

Verbose logs showing the problem

Environment Information + PowerShell Version

OsName               : Microsoft Windows 10 Enterprise
OsOperatingSystemSKU : EnterpriseEdition
OsArchitecture       : 64-bit
WindowsVersion       : 2009
WindowsBuildLabEx    : 19041.1.amd64fre.vb_release.191206-1406
OsLanguage           : en-GB
OsMuiLanguages       : {en-GB}

Name                           Value
----                           -----
PSVersion                      7.4.6
PSEdition                      Core
GitCommitId                    7.4.6
OS                             Microsoft Windows 10.0.19045
Platform                       Win32NT
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0

[slaurentpco]

I guess it's also fixed by #5746 . Thanks @FabienTschanz

[FabienTschanz]

Thank you for the confirmation. Do you mind closing the issue then?

[slaurentpco]

I did not test the fix, I only use released versions...

[FabienTschanz]

@slaurentpco Version is now released - Feel free to try again.

[slaurentpco]

all OK