TeamsTeam: w/o owners -> incomplete export ("Cannot index into a null array")

[Fuerst2718]

Description of the issue

If a TeamsTeam has no owners (may happen if all the owner-accounts are removed from Azure-AD), during the export an errormessage is generated and the data exported for the ownerless team are incomplete (Names/identifiers below anonymized)

Team “TeamWithOutOwner” (the one without an owner)

PS C:\Users\anon\AppData\Local\Temp> Get-TeamUser -GroupId $((Get-TeamByName "TeamWithOutOwner").GroupId)|select UserId,Role

UserId                               Role  
------                               ----  
bb403152-1718-4592-ba15-c31f06f78aff member
c914768e-0207-4b1a-acd7-a9ea5d4d5d00 member
…

Members of Team “TeamWithOwner” (another one with an owner)

PS C:\Users\anon\AppData\Local\Temp> Get-TeamUser -GroupId $((Get-TeamByName "TeamWithOwner").GroupId)|select UserId,Role

UserId                               Role  
------                               ----  
00d3e00e-e962-406f-afff-882e36ad2b72 owner 
e800e0d1-1663-41ec-b3b4-98099ee0fd77 member
7cab7a56-7e3f-4d6c-a4d0-24961fc63cb4 member
…

Members of "TeamWithOutOwner"

PS C:\Users\anon\AppData\Local\Temp> Get-TeamUser -GroupId $((Get-TeamByName "TeamWithOutOwner").GroupId)|select UserId,Role

UserId                               Role  
------                               ----  
bb403152-1718-4592-ba15-c31f06f78aff member
c914768e-0207-4b1a-acd7-a9ea5d4d5d00 member
83435055-f13c-44b5-abbc-6db97175265c member
1cf2c031-252c-4ea7-8ae6-c85457ddc390 member
d48acd34-0905-4e45-8604-c9a11c5179a3 member
fc24784d-0406-4138-8ddb-bf69534251d7 member

Output from the exported file (ownerless team only 4 properties)

…
        TeamsTeam "TeamsTeam-TeamWithOutOwner"
        {
            Credential           = $Credscredential;
            DisplayName          = "TeamWithOutOwner";
            Ensure               = "Absent";
            GroupID              = "af9d3806-7ee3-4369-bcc5-3eae4a826c51";
        }
        TeamsTeam "TeamsTeam-TeamWithOwner"
        {
            AllowAddRemoveApps                = $True;
            AllowChannelMentions              = $True;
            AllowCreateUpdateChannels         = $True;
            AllowCreateUpdateRemoveConnectors = $True;
            AllowCreateUpdateRemoveTabs       = $True;
            AllowCustomMemes                  = $True;
            AllowDeleteChannels               = $True;
            AllowGiphy                        = $True;
            AllowGuestCreateUpdateChannels    = $False;
            AllowGuestDeleteChannels          = $False;
            AllowOwnerDeleteMessages          = $True;
            AllowStickersAndMemes             = $True;
            AllowTeamMentions                 = $True;
            AllowUserDeleteMessages           = $True;
            AllowUserEditMessages             = $True;
            Credential                        = $Credscredential;
            Description                       = "TeamWithOwner";
            DisplayName                       = "TeamWithOwner";
            Ensure                            = "Present";
            GiphyContentRating                = "moderate";
            GroupID                           = "bd54bd6a-a2ae-4052-9632-ad74389a466d";
            MailNickName                      = "teamswithowner";
            Owner                             = "[email protected]";
            ShowInTeamsSearchAndSuggestions   = $False;
            Visibility                        = "Private";
        } 

…

Message regarding entry in the Error Log

    |---[97/133] MD´s Teams Group✅
    |---[98/133] TeamWithOutOwner Error Log created at {file://C:/Users/anon/AppData/Local/Temp/6524-M365DSC-ErrorLog.log}
✅
    |---[99/133] TeamWithOwner✅

The corresponding message in the log is

[2023-10-05 10:48:53]
{InvalidOperation}
System.Management.Automation.RuntimeException: Cannot index into a null array.
   at System.Management.Automation.ExceptionHandlingOps.CheckActionPreference(FunctionContext funcContext, Exception exception)
   at Get-TargetResource(Closure , FunctionContext )
"Error retrieving data:"
at Get-TargetResource, C:\Program Files\WindowsPowerShell\Modules\Microsoft365DSC\1.23.1004.1\DSCResources\MSFT_TeamsTeam\MSFT_TeamsTeam.psm1: line 179
at Export-TargetResource, C:\Program Files\WindowsPowerShell\Modules\Microsoft365DSC\1.23.1004.1\DSCResources\MSFT_TeamsTeam\MSFT_TeamsTeam.psm1: line 701
at Start-M365DSCConfigurationExtract, C:\Program Files\WindowsPowerShell\Modules\Microsoft365DSC\1.23.1004.1\modules\M365DSCReverse.psm1: line 615
at Export-M365DSCConfiguration, C:\Program Files\WindowsPowerShell\Modules\Microsoft365DSC\1.23.1004.1\modules\M365DSCUtil.psm1: line 1312
at ExportM365DSCConfiguration, C:\Scripts\M365\e.ps1: line 344
at <ScriptBlock>, C:\Scripts\M365\e.ps1: line 774
[email protected]
TenantId: company.onmicrosoft.com

Microsoft 365 DSC Version

1.23.1004.1

Which workloads are affected

Teams

The DSC configuration

No response

Verbose logs showing the problem

No response

Environment Information + PowerShell Version

OsName               : Microsoft Windows Server 2016 Standard
OsOperatingSystemSKU : StandardServerEdition
OsArchitecture       : 64-bit
WindowsBuildLabEx    : 14393.4825.amd64fre.rs1_release.211202-1611
OsLanguage           : en-US
OsMuiLanguages       : {en-US, de-DE}

Key   : PSVersion
Value : 5.1.14393.4583
Name  : PSVersion

Key   : PSEdition
Value : Desktop
Name  : PSEdition

Key   : PSCompatibleVersions
Value : {1.0, 2.0, 3.0, 4.0...}
Name  : PSCompatibleVersions

Key   : BuildVersion
Value : 10.0.14393.4583
Name  : BuildVersion

Key   : CLRVersion
Value : 4.0.30319.42000
Name  : CLRVersion

Key   : WSManStackVersion
Value : 3.0
Name  : WSManStackVersion

Key   : PSRemotingProtocolVersion
Value : 2.3
Name  : PSRemotingProtocolVersion

Key   : SerializationVersion
Value : 1.1.0.1
Name  : SerializationVersion