TeamsTenantDialPlan: Empty Global DialPlan not load NormalizationRules

[abx-mariusdaepp]

Description of the issue

The Global Policy exist on a new Tenant. But is empty without Normalization Rules. The problem is that an existing Policy without NormalizationRules the Desired NormalizationRules not will be Added.

maby because the function "Get-M365DSCVoiceNormalizationRulesDifference" mandatories the CurrentRules. which are null

See the Logs. After "Tenant Dial Plan {Global} already exists. Updating it." he made no changes.

Microsoft 365 DSC Version

1.23.1004.1

Which workloads are affected

Teams

The DSC configuration

Configuration MasterConfig
{
    param (
    )

    Import-DscResource -ModuleName 'Microsoft365DSC'

    Node localhost
    {
        
        
        TeamsTenantDialPlan TestDialPlan
        {
            ApplicationId             = $ConfigurationData.NonNodeData.ApplicationId;
            CertificateThumbprint     = $ConfigurationData.NonNodeData.CertificateThumbprint;
            TenantId                  = $ConfigurationData.NonNodeData.TenantId;
            Ensure                = "Present";
            Identity              = "Global";
            NormalizationRules    = @(MSFT_TeamsVoiceNormalizationRule{
                Pattern = '^0(900\d*)$'
                Description = ''
                Identity = '0900 Nummern'
                Translation = '+41$1'
                IsInternalExtension = $False
            });
            OptimizeDeviceDialing = $False;
            SimpleName            = "DefaultTenantDialPlan";
        }
        
    }
}
MasterConfig -ConfigurationData .\ConfigurationData.psd1

Verbose logs showing the problem

PS C:\Temp\TestDSC\Export-Config> Start-DSCConfiguration -Path .\MasterConfig -Verbose -Wait
VERBOSE: Perform operation 'Invoke CimMethod' with following parameters, ''methodName' = SendConfigurationApply,'className' = MSFT_DSCLocalConfigurationManager,'namespaceName' = root/Microsoft/Windows/DesiredStateConfiguration'.
VERBOSE: An LCM method call arrived from computer XXX with user sid .
VERBOSE: [XXX]: LCM:  [ Start  Set      ]
VERBOSE: [XXX]: LCM:  [ Start  Resource ]  [[TeamsTenantDialPlan]TestDialPlan]
VERBOSE: [XXX]: LCM:  [ Start  Test     ]  [[TeamsTenantDialPlan]TestDialPlan]
VERBOSE: [XXX]:                            [[TeamsTenantDialPlan]TestDialPlan] Testing configuration of Teams Guest Calling
VERBOSE: [XXX]:                            [[TeamsTenantDialPlan]TestDialPlan] Getting configuration of Teams Tenant Dial Plan
VERBOSE: [XXX]:                            [[TeamsTenantDialPlan]TestDialPlan] Found existing Dial Plan {Global}
VERBOSE: [XXX]:                            [[TeamsTenantDialPlan]TestDialPlan] Current Values: ApplicationId=***
CertificateThumbprint=***
Credential=$null
Description=$null
Ensure=Present
ExternalAccessPrefix=$null
Identity=Global
NormalizationRules=()
OptimizeDeviceDialing=False
SimpleName=DefaultTenantDialPlan
TenantId=***
VERBOSE: [XXX]:                            [[TeamsTenantDialPlan]TestDialPlan] Target Values: ApplicationId=***
CertificateThumbprint=***
Ensure=Present
Identity=Global
NormalizationRules=({Identity=0900 Nummern; Priority=; Description=; Pattern=^0(900\d*)$; Translation=+41$1; IsInternalExtension=False})
OptimizeDeviceDialing=False
SimpleName=DefaultTenantDialPlan
TenantId=***
Verbose=True
VERBOSE: [XXX]: LCM:  [ End    Test     ]  [[TeamsTenantDialPlan]TestDialPlan]  in 0.8920 seconds.
VERBOSE: [XXX]: LCM:  [ Start  Set      ]  [[TeamsTenantDialPlan]TestDialPlan]
VERBOSE: [XXX]:                            [[TeamsTenantDialPlan]TestDialPlan] Setting configuration of Teams Guest Calling
VERBOSE: [XXX]:                            [[TeamsTenantDialPlan]TestDialPlan] Getting configuration of Teams Tenant Dial Plan
VERBOSE: [XXX]:                            [[TeamsTenantDialPlan]TestDialPlan] Found existing Dial Plan {Global}
VERBOSE: [XXX]:                            [[TeamsTenantDialPlan]TestDialPlan] Tenant Dial Plan {Global} already exists. Updating it.
VERBOSE: [XXX]: LCM:  [ End    Set      ]  [[TeamsTenantDialPlan]TestDialPlan]  in 0.8970 seconds.
VERBOSE: [XXX]: LCM:  [ End    Resource ]  [[TeamsTenantDialPlan]TestDialPlan]
VERBOSE: [XXX]: LCM:  [ End    Set      ]
VERBOSE: [XXX]: LCM:  [ End    Set      ]    in  1.9300 seconds.
VERBOSE: Operation 'Invoke CimMethod' complete.
VERBOSE: Time taken for configuration job to complete is 2.097 seconds

Environment Information + PowerShell Version

Name                           Value                                                                                                                                                                                                                            
----                           -----                                                                                                                                                                                                                            
PSVersion                      5.1.17763.2931                                                                                                                                                                                                                   
PSEdition                      Desktop                                                                                                                                                                                                                          
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}                                                                                                                                                                                                          
BuildVersion                   10.0.17763.2931                                                                                                                                                                                                                  
CLRVersion                     4.0.30319.42000                                                                                                                                                                                                                  
WSManStackVersion              3.0                                                                                                                                                                                                                              
PSRemotingProtocolVersion      2.3                                                                                                                                                                                                                              
SerializationVersion           1.1.0.1