Set-AzSqlServerAudit not working for LogAnalytics workspace in different subscription ( Response Conflict )

## Description
Using the Cloud shell in the azure portal I'm trying to test the Set-AzSqlServerAudit command to enable SQL Auditing to a Log analytics workspace. This works perfectly fine if the LogAnalytics workspace is in the same subscription as the Sql Server. However if I try to refer to a LogAnalytics workspace which is in a different subscription the command gives the following result :

Set-AzSqlServerAudit: One or more errors occurred. (Operation returned an invalid status code 'Conflict')


## Steps to reproduce

```
Set-AzSqlServerAudit -ResourceGroupName "ResourceGroup01" -ServerName "Server01" -LogAnalyticsTargetState Enabled -WorkspaceResourceId "/subscriptions/$subscrptionIdLAWorkspace)/resourceGroups/$resGrpLaWorkspace/providers/Microsoft.OperationalInsights/workspaces/$LaWorkspace"
```

## Environment data

```
Name Value
---- -----
PSVersion 7.0.3
PSEdition Core
GitCommitId 7.0.3
OS Linux 4.15.0-1092-azure #102~16.04.1-Ubuntu SMP Tue Jul 14 20:28:23 UTC 2020
Platform Unix
PSCompatibleVersions {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion 2.3
SerializationVersion 1.1.0.1
WSManStackVersion 3.0
```

## Module versions

```

Directory: /usr/local/share/powershell/Modules

ModuleType Version PreRelease Name PSEdition ExportedCommands
---------- ------- ---------- ---- --------- ----------------
Script 4.6.1 Az Core,Desk
Script 1.9.3 Az.Accounts Core,Desk {Disable-AzDataCollection, Disable-AzContextAutosave, Enable-AzDataCollection, Enable-AzContextAutosave…}
Script 1.1.1 Az.Advisor Core,Desk {Get-AzAdvisorRecommendation, Enable-AzAdvisorRecommendation, Disable-AzAdvisorRecommendation, Get-AzAdvisorConfiguration…}
Script 1.2.0 Az.Aks Core,Desk {Get-AzAksCluster, New-AzAksCluster, Remove-AzAksCluster, Import-AzAksCredential…}
Script 1.1.4 Az.AnalysisServices Core,Desk {Resume-AzAnalysisServicesServer, Suspend-AzAnalysisServicesServer, Get-AzAnalysisServicesServer, Remove-AzAnalysisServicesServer…}
Script 2.1.0 Az.ApiManagement Core,Desk {Add-AzApiManagementApiToGateway, Add-AzApiManagementApiToProduct, Add-AzApiManagementProductToGroup, Add-AzApiManagementRegion…}
Script 1.1.0 Az.ApplicationInsights Core,Desk {Get-AzApplicationInsights, New-AzApplicationInsights, Remove-AzApplicationInsights, Update-AzApplicationInsights…}
Script 1.4.0 Az.Automation Core,Desk {Get-AzAutomationHybridWorkerGroup, Remove-AzAutomationHybridWorkerGroup, Get-AzAutomationJobOutputRecord, Import-AzAutomationDscNodeConfigura…
Script 3.1.0 Az.Batch Core,Desk {Remove-AzBatchAccount, Get-AzBatchAccount, Get-AzBatchAccountKey, New-AzBatchAccount…}
Script 1.0.3 Az.Billing Core,Desk {Get-AzBillingInvoice, Get-AzBillingPeriod, Get-AzEnrollmentAccount, Get-AzConsumptionBudget…}
Script 1.4.3 Az.Cdn Core,Desk {Get-AzCdnProfile, Get-AzCdnProfileSsoUrl, New-AzCdnProfile, Remove-AzCdnProfile…}
Script 1.5.1 Az.CognitiveServices Core,Desk {Get-AzCognitiveServicesAccount, Get-AzCognitiveServicesAccountKey, Get-AzCognitiveServicesAccountSku, Get-AzCognitiveServicesAccountType…}
Script 4.3.1 Az.Compute Core,Desk {Remove-AzAvailabilitySet, Get-AzAvailabilitySet, New-AzAvailabilitySet, Update-AzAvailabilitySet…}
Script 1.0.3 Az.ContainerInstance Core,Desk {New-AzContainerGroup, Get-AzContainerGroup, Remove-AzContainerGroup, Get-AzContainerInstanceLog}
Script 1.1.1 Az.ContainerRegistry Core,Desk {New-AzContainerRegistry, Get-AzContainerRegistry, Update-AzContainerRegistry, Remove-AzContainerRegistry…}
Script 1.1.0 Az.DataBoxEdge Core,Desk {Get-AzDataBoxEdgeJob, Get-AzDataBoxEdgeDevice, Invoke-AzDataBoxEdgeDevice, New-AzDataBoxEdgeDevice…}
Script 1.10.0 Az.DataFactory Core,Desk {Set-AzDataFactoryV2, Update-AzDataFactoryV2, Get-AzDataFactoryV2, Remove-AzDataFactoryV2…}
Script 1.0.2 Az.DataLakeAnalytics Core,Desk {Get-AzDataLakeAnalyticsDataSource, New-AzDataLakeAnalyticsCatalogCredential, Remove-AzDataLakeAnalyticsCatalogCredential, Set-AzDataLakeAnaly…
Script 1.2.8 Az.DataLakeStore Core,Desk {Get-AzDataLakeStoreTrustedIdProvider, Remove-AzDataLakeStoreTrustedIdProvider, Remove-AzDataLakeStoreFirewallRule, Set-AzDataLakeStoreTrusted…
Script 1.0.0 Az.DataShare Core,Desk {New-AzDataShareAccount, Get-AzDataShareAccount, Remove-AzDataShareAccount, New-AzDataShare…}
Script 1.1.0 Az.DeploymentManager Core,Desk {Get-AzDeploymentManagerArtifactSource, New-AzDeploymentManagerArtifactSource, Set-AzDeploymentManagerArtifactSource, Remove-AzDeploymentManag…
Script 1.0.0 Az.DesktopVirtualization Core,Desk {Disconnect-AzWvdUserSession, Get-AzWvdApplication, Get-AzWvdApplicationGroup, Get-AzWvdDesktop…}
Script 1.0.2 Az.DevTestLabs Core,Desk {Get-AzDtlAllowedVMSizesPolicy, Get-AzDtlAutoShutdownPolicy, Get-AzDtlAutoStartPolicy, Get-AzDtlVMsPerLabPolicy…}
Script 1.1.2 Az.Dns Core,Desk {Get-AzDnsRecordSet, New-AzDnsRecordConfig, Remove-AzDnsRecordSet, Set-AzDnsRecordSet…}
Script 1.3.0 Az.EventGrid Core,Desk {New-AzEventGridTopic, Get-AzEventGridTopic, Set-AzEventGridTopic, New-AzEventGridTopicKey…}
Script 1.5.0 Az.EventHub Core,Desk {New-AzEventHubNamespace, Get-AzEventHubNamespace, Set-AzEventHubNamespace, Remove-AzEventHubNamespace…}
Script 1.6.1 Az.FrontDoor Core,Desk {New-AzFrontDoor, Get-AzFrontDoor, Set-AzFrontDoor, Remove-AzFrontDoor…}
Script 1.0.1 Az.Functions Core,Desk {Get-AzFunctionApp, Get-AzFunctionAppAvailableLocation, Get-AzFunctionAppPlan, Get-AzFunctionAppSetting…}
Script 0.10.8 Az.GuestConfiguration Core,Desk {Get-AzVMGuestPolicyStatus, Get-AzVMGuestPolicyStatusHistory}
Script 3.5.0 Az.HDInsight Core,Desk {Get-AzHDInsightJob, New-AzHDInsightSqoopJobDefinition, Wait-AzHDInsightJob, New-AzHDInsightStreamingMapReduceJobDefinition…}
Script 1.1.0 Az.HealthcareApis Core,Desk {New-AzHealthcareApisService, Remove-AzHealthcareApisService, Set-AzHealthcareApisService, Get-AzHealthcareApisService}
Script 2.5.0 Az.IotHub Core,Desk {Add-AzIotHubKey, Get-AzIotHubEventHubConsumerGroup, Get-AzIotHubConnectionString, Get-AzIotHubJob…}
Script 2.1.0 Az.KeyVault Core,Desk {Add-AzKeyVaultCertificate, Update-AzKeyVaultCertificate, Stop-AzKeyVaultCertificateOperation, Get-AzKeyVaultCertificateOperation…}
Script 1.3.2 Az.LogicApp Core,Desk {Get-AzIntegrationAccountAgreement, Get-AzIntegrationAccountAssembly, Get-AzIntegrationAccountBatchConfiguration, Get-AzIntegrationAccountCall…
Script 1.1.3 Az.MachineLearning Core,Desk {Move-AzMlCommitmentAssociation, Get-AzMlCommitmentAssociation, Get-AzMlCommitmentPlanUsageHistory, Remove-AzMlCommitmentPlan…}
Script 1.1.0 Az.Maintenance Core,Desk {Get-AzApplyUpdate, Get-AzConfigurationAssignment, Get-AzMaintenanceConfiguration, Get-AzMaintenanceUpdate…}
Script 1.1.0 Az.ManagedServices Core,Desk {Get-AzManagedServicesAssignment, New-AzManagedServicesAssignment, Remove-AzManagedServicesAssignment, Get-AzManagedServicesDefinition…}
Script 1.0.2 Az.MarketplaceOrdering Core,Desk {Get-AzMarketplaceTerms, Set-AzMarketplaceTerms}
Script 1.1.1 Az.Media Core,Desk {Sync-AzMediaServiceStorageKey, Set-AzMediaServiceKey, Get-AzMediaServiceKey, Get-AzMediaServiceNameAvailability…}
Script 2.1.0 Az.Monitor Core,Desk {Get-AzMetricDefinition, Get-AzMetric, Remove-AzLogProfile, Get-AzLogProfile…}
Script 3.3.0 Az.Network Core,Desk {Add-AzApplicationGatewayAuthenticationCertificate, Get-AzApplicationGatewayAuthenticationCertificate, New-AzApplicationGatewayAuthenticationC…
Script 1.1.1 Az.NotificationHubs Core,Desk {Get-AzNotificationHub, Get-AzNotificationHubAuthorizationRule, Get-AzNotificationHubListKey, Get-AzNotificationHubPNSCredential…}
Script 2.3.0 Az.OperationalInsights Core,Desk {New-AzOperationalInsightsAzureActivityLogDataSource, New-AzOperationalInsightsCustomLogDataSource, Disable-AzOperationalInsightsLinuxCustomLo…
Script 1.3.1 Az.PolicyInsights Core,Desk {Get-AzPolicyEvent, Get-AzPolicyState, Get-AzPolicyStateSummary, Get-AzPolicyRemediation…}
Script 1.1.2 Az.PowerBIEmbedded Core,Desk {Remove-AzPowerBIWorkspaceCollection, Get-AzPowerBIWorkspaceCollection, Get-AzPowerBIWorkspaceCollectionAccessKey, Get-AzPowerBIWorkspace…}
Script 1.0.3 Az.PrivateDns Core,Desk {Get-AzPrivateDnsZone, Remove-AzPrivateDnsZone, Set-AzPrivateDnsZone, New-AzPrivateDnsZone…}
Script 2.11.1 Az.RecoveryServices Core,Desk {Get-AzRecoveryServicesBackupProperty, Get-AzRecoveryServicesVault, Get-AzRecoveryServicesVaultSettingsFile, New-AzRecoveryServicesVault…}
Script 1.2.1 Az.RedisCache Core,Desk {Remove-AzRedisCachePatchSchedule, New-AzRedisCacheScheduleEntry, Get-AzRedisCachePatchSchedule, New-AzRedisCachePatchSchedule…}
Script 1.0.3 Az.Relay Core,Desk {New-AzRelayNamespace, Get-AzRelayNamespace, Set-AzRelayNamespace, Remove-AzRelayNamespace…}
Script 2.5.0 Az.Resources Core,Desk {Get-AzProviderOperation, Remove-AzRoleAssignment, Get-AzRoleAssignment, New-AzRoleAssignment…}
Script 1.4.1 Az.ServiceBus Core,Desk {New-AzServiceBusNamespace, Get-AzServiceBusNamespace, Set-AzServiceBusNamespace, Remove-AzServiceBusNamespace…}
Script 2.1.0 Az.ServiceFabric Core,Desk {Add-AzServiceFabricClientCertificate, Add-AzServiceFabricClusterCertificate, Add-AzServiceFabricNode, Add-AzServiceFabricNodeType…}
Script 1.2.0 Az.SignalR Core,Desk {New-AzSignalR, Get-AzSignalR, Get-AzSignalRKey, New-AzSignalRKey…}
Script 2.9.1 Az.Sql Core,Desk {Get-AzSqlDatabaseTransparentDataEncryption, Get-AzSqlDatabaseTransparentDataEncryptionActivity, Set-AzSqlDatabaseTransparentDataEncryption, G…
Script 1.1.0 Az.SqlVirtualMachine Core,Desk {New-AzSqlVM, Get-AzSqlVM, Update-AzSqlVM, Remove-AzSqlVM…}
Script 2.5.0 Az.Storage Core,Desk {Get-AzStorageAccount, Get-AzStorageAccountKey, New-AzStorageAccount, New-AzStorageAccountKey…}
Script 1.3.0 Az.StorageSync Core,Desk {Invoke-AzStorageSyncCompatibilityCheck, New-AzStorageSyncService, Get-AzStorageSyncService, Set-AzStorageSyncService…}
Script 1.0.1 Az.StreamAnalytics Core,Desk {Get-AzStreamAnalyticsFunction, Get-AzStreamAnalyticsDefaultFunctionDefinition, New-AzStreamAnalyticsFunction, Remove-AzStreamAnalyticsFunctio…
Script 1.0.0 Az.Support Core,Desk {Get-AzSupportService, Get-AzSupportProblemClassification, Get-AzSupportTicket, Get-AzSupportTicketCommunication…}
Script 1.0.4 Az.TrafficManager Core,Desk {Add-AzTrafficManagerCustomHeaderToEndpoint, Remove-AzTrafficManagerCustomHeaderFromEndpoint, Add-AzTrafficManagerCustomHeaderToProfile, Remov…
Script 1.11.0 Az.Websites Core,Desk {Get-AzAppServicePlan, Set-AzAppServicePlan, New-AzAppServicePlan, Remove-AzAppServicePlan…}
Script 0.0.0.10 AzureAD.Standard.Preview Desk {Set-AzureADUserPassword, Get-AzureADDeletedApplication, New-AzureADDevice, Revoke-AzureADSignedInUserAllRefreshToken…}
Script 0.9.3 AzurePSDrive Desk
Script 17.0.4716… EXOPSSessionConnector Desk Connect-EXOPSSession
Binary 0.1.1 Microsoft.PowerShell.UnixCompleters Core {Import-UnixCompleters, Remove-UnixCompleters, Set-UnixCompleter}
Manifest 1.0.840 MicrosoftPowerBIMgmt Desk
Binary 1.0.840 MicrosoftPowerBIMgmt.Admin Desk {Add-PowerBIEncryptionKey, Get-PowerBIEncryptionKey, Get-PowerBIWorkspaceEncryptionStatus, Switch-PowerBIEncryptionKey…}
Binary 1.0.840 MicrosoftPowerBIMgmt.Capacities Desk Get-PowerBICapacity
Binary 1.0.840 MicrosoftPowerBIMgmt.Data Desk {Add-PowerBIDataset, Set-PowerBITable, New-PowerBIDataset, New-PowerBITable…}
Binary 1.0.840 MicrosoftPowerBIMgmt.Profile Desk {Connect-PowerBIServiceAccount, Disconnect-PowerBIServiceAccount, Invoke-PowerBIRestMethod, Get-PowerBIAccessToken…}
Binary 1.0.840 MicrosoftPowerBIMgmt.Reports Desk {Get-PowerBIReport, New-PowerBIReport, Export-PowerBIReport, Get-PowerBIDashboard…}
Binary 1.0.840 MicrosoftPowerBIMgmt.Workspaces Desk {Get-PowerBIWorkspace, Get-PowerBIWorkspaceMigrationStatus, Add-PowerBIWorkspaceUser, Remove-PowerBIWorkspaceUser…}
Binary 1.1.4 MicrosoftTeams Core,Desk {Add-TeamUser, Connect-MicrosoftTeams, Disconnect-MicrosoftTeams, Get-CsPolicyPackage…}
Script 0.9.3 PSCloudShellUtility Desk {Enter-AzVM, Get-AzCommand, Invoke-AzVMCommand, Enable-AzVMPSRemoting…}
Binary 0.8.1 SHiPS Desk
Script 21.1.18226 SqlServer Desk {Add-RoleMember, Add-SqlAvailabilityDatabase, Add-SqlAvailabilityGroupListenerStaticIp, Add-SqlAzureAuthenticationContext…}

Directory: /opt/microsoft/powershell/7/Modules

ModuleType Version PreRelease Name PSEdition ExportedCommands
---------- ------- ---------- ---- --------- ----------------
Manifest 1.2.5 Microsoft.PowerShell.Archive Desk {Compress-Archive, Expand-Archive}
Manifest 7.0.0.0 Microsoft.PowerShell.Host Core {Start-Transcript, Stop-Transcript}
Manifest 7.0.0.0 Microsoft.PowerShell.Management Core {Add-Content, Clear-Content, Clear-ItemProperty, Join-Path…}
Manifest 7.0.0.0 Microsoft.PowerShell.Security Core {Get-Credential, Get-ExecutionPolicy, Set-ExecutionPolicy, ConvertFrom-SecureString…}
Manifest 7.0.0.0 Microsoft.PowerShell.Utility Core {Export-Alias, Get-Alias, Import-Alias, New-Alias…}
Script 1.4.7 PackageManagement Desk {Find-Package, Get-Package, Get-PackageProvider, Get-PackageSource…}
Script 2.2.4.1 PowerShellGet Desk {Find-Command, Find-DSCResource, Find-Module, Find-RoleCapability…}
Script 2.0.5 PSDesiredStateConfiguration Core {Configuration, New-DscChecksum, Get-DscResource, Invoke-DscResource}
Script 2.0.2 PSReadLine Desk {Get-PSReadLineKeyHandler, Set-PSReadLineKeyHandler, Remove-PSReadLineKeyHandler, Get-PSReadLineOption…}
Binary 2.0.3 ThreadJob Desk Start-ThreadJob
```

## Debug output

```
Set-AzSqlServerAudit: One or more errors occurred. (Operation returned an invalid status code 'Conflict')
DEBUG: AzureQoSEvent: CommandName - Set-AzSqlServerAudit; IsSuccess - False; Duration - 00:00:02.9500913;; Exception - System.AggregateException: One or more errors occurred. (Operation returned an invalid status code 'Conflict')
---> Microsoft.Azure.Management.Monitor.Version2018_09_01.Models.ErrorResponseException: Operation returned an invalid status code 'Conflict'
at Microsoft.Azure.Management.Monitor.Version2018_09_01.DiagnosticSettingsOperations.CreateOrUpdateWithHttpMessagesAsync(String resourceUri, DiagnosticSettingsResource parameters, String name, Dictionary`2 customHeaders, CancellationToken cancellationToken)
at Microsoft.Azure.Management.Monitor.Version2018_09_01.DiagnosticSettingsOperationsExtensions.CreateOrUpdateAsync(IDiagnosticSettingsOperations operations, String resourceUri, DiagnosticSettingsResource parameters, String name, CancellationToken cancellationToken)
--- End of inner exception stack trace ---
at System.Threading.Tasks.Task`1.GetResultCore(Boolean waitCompletionNotification)
at System.Threading.Tasks.Task`1.get_Result()
at Microsoft.Azure.Commands.Sql.Auditing.Services.AuditingEndpointsCommunicator.UpdateDiagnosticSettings(DiagnosticSettingsResource settings, String resourceGroupName, String serverName, String databaseName)
at Microsoft.Azure.Commands.Sql.Auditing.Services.SqlAuditAdapter.UpdateDiagnosticSettings(DiagnosticSettingsResource settings, ServerAuditModel model)
at Microsoft.Azure.Commands.Sql.Auditing.Services.SqlAuditAdapter.EnableDiagnosticsAuditWhenOnlyAuditCategoryIsEnabled(ServerAuditModel model, DiagnosticSettingsResource settings, String oldEventHubName, String oldEventHubAuthorizationRuleId, String oldWorkspaceId)
at Microsoft.Azure.Commands.Sql.Auditing.Services.SqlAuditAdapter.ChangeAuditWhenOnlyAuditCategoryIsEnabled(ServerAuditModel model, DiagnosticSettingsResource settings)
at Microsoft.Azure.Commands.Sql.Auditing.Services.SqlAuditAdapter.ChangeAuditWhenDiagnosticsEnablingAuditCategoryExist(ServerAuditModel model, DiagnosticSettingsResource settings)
at Microsoft.Azure.Commands.Sql.Auditing.Services.SqlAuditAdapter.PersistAuditChanges(ServerAuditModel model)
at Microsoft.Azure.Commands.Sql.Auditing.Cmdlet.SetAzSqlServerAudit.PersistChanges(ServerAuditModel entity)
at Microsoft.Azure.Commands.Sql.Common.AzureSqlCmdletBase`2.<>c__DisplayClass16_0.b__0()
at Microsoft.WindowsAzure.Commands.Utilities.Common.AzurePSCmdlet.ConfirmAction(String processMessage, String target, Action action)
at Microsoft.Azure.Commands.Sql.Common.AzureSqlCmdletBase`2.ExecuteCmdlet()
at Microsoft.WindowsAzure.Commands.Utilities.Common.CmdletExtensions.<>c__3`1.b__3_0(T c)
at Microsoft.WindowsAzure.Commands.Utilities.Common.CmdletExtensions.ExecuteSynchronouslyOrAsJob[T](T cmdlet, Action`1 executor)
at Microsoft.WindowsAzure.Commands.Utilities.Common.CmdletExtensions.ExecuteSynchronouslyOrAsJob[T](T cmdlet)
at Microsoft.WindowsAzure.Commands.Utilities.Common.AzurePSCmdlet.ProcessRecord();
DEBUG: Finish sending metric.
DEBUG: 8:58:18 PM - SetAzSqlServerAudit end processing.
```

## Error output

```
DEBUG: 9:01:01 PM - ResolveError begin processing with ParameterSet 'AnyErrorParameterSet'.
DEBUG: 9:01:01 PM - using account id 'MSI@50342'...
WARNING: Breaking changes in the cmdlet 'Resolve-AzError' :
WARNING: - The `Resolve-Error` alias will be removed in a future release. Please change any scripts that use this alias to use `Resolve-AzError` instead.

WARNING: NOTE : Go to https://aka.ms/azps-changewarnings for steps to suppress this breaking change warning, and other information on breaking changes in Azure PowerShell.

HistoryId: 5

Message : Operation returned an invalid status code 'Conflict'
StackTrace : at Microsoft.Azure.Management.Monitor.Version2018_09_01.DiagnosticSettingsOperations.CreateOrUpdateWithHttpMessagesAsync(String resourceUri, DiagnosticSettingsResource parameters, String name,
Dictionary`2 customHeaders, CancellationToken cancellationToken)
at Microsoft.Azure.Management.Monitor.Version2018_09_01.DiagnosticSettingsOperationsExtensions.CreateOrUpdateAsync(IDiagnosticSettingsOperations operations, String resourceUri,
DiagnosticSettingsResource parameters, String name, CancellationToken cancellationToken)
Exception : Microsoft.Azure.Management.Monitor.Version2018_09_01.Models.ErrorResponseException
InvocationInfo : {Set-AzSqlServerAudit}
Line : Set-AzSqlServerAudit -LogAnalyticsTargetState Enabled -ResourceGroupName "rnhb-core-dev" -ServerName "rnhb-core-sql-dev" -WorkspaceResourceId
"/subscriptions/e256e17d-8dd3-440e-997d-f054fe14e58a/resourceGroups/rnhb-ota-tst/providers/Microsoft.OperationalInsights/workspaces/rnhb-law-tst"
Position : At line:1 char:1
+ Set-AzSqlServerAudit -LogAnalyticsTargetState Enabled -ResourceGroupN …
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
HistoryId : 5

HistoryId: 1

Message : Operation returned an invalid status code 'Conflict'
StackTrace : at Microsoft.Azure.Management.Monitor.Version2018_09_01.DiagnosticSettingsOperations.CreateOrUpdateWithHttpMessagesAsync(String resourceUri, DiagnosticSettingsResource parameters, String name,
Dictionary`2 customHeaders, CancellationToken cancellationToken)
at Microsoft.Azure.Management.Monitor.Version2018_09_01.DiagnosticSettingsOperationsExtensions.CreateOrUpdateAsync(IDiagnosticSettingsOperations operations, String resourceUri,
DiagnosticSettingsResource parameters, String name, CancellationToken cancellationToken)
Exception : Microsoft.Azure.Management.Monitor.Version2018_09_01.Models.ErrorResponseException
InvocationInfo : {Set-AzSqlServerAudit}
Line : Set-AzSqlServerAudit -LogAnalyticsTargetState Enabled -ResourceGroupName "rnhb-core-dev" -ServerName "rnhb-core-sql-dev" -WorkspaceResourceId
"/subscriptions/e256e17d-8dd3-440e-997d-f054fe14e58a/resourceGroups/rnhb-ota-tst/providers/Microsoft.OperationalInsights/workspaces/rnhb-law-tst"
Position : At line:1 char:1
+ Set-AzSqlServerAudit -LogAnalyticsTargetState Enabled -ResourceGroupN …
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
HistoryId : 1

The Azure PowerShell team is listening, please let us know how we are doing: https://aka.ms/azpssurvey?Q_CHL=ERROR.

DEBUG: AzureQoSEvent: CommandName - Resolve-AzError; IsSuccess - True; Duration - 00:00:00.0233691;
DEBUG: Finish sending metric.
DEBUG: 9:01:02 PM - ResolveError end processing.
```

Start by reproducing Set-AzSqlServerAudit with the provided cross-subscription WorkspaceResourceId and compare it with a workspace in the SQL Server subscription. Trace the Az.Sql implementation and its tests for LogAnalyticsTargetState and WorkspaceResourceId; done means enabling auditing succeeds for a workspace in another subscription without the Conflict response.

Written by the indexing model from the issue text.