Hashtable-to-Object conversion is not supported in restricted language mode

Lastly, I’ve encountered an interesting PowerShell error after upgrading several servers running Exchange Server 2013 CU9 to Exchange Server 2013 CU11.

After a successful upgrade, the Exchange PowerShell script to redistribute the DAG databases failed with an error.

.\RedistributeActiveDatabases.ps1 -DagName DAG01 -BalanceDbsByActivationPreference -Confirm:$false
Cannot process argument transformation on parameter 'Identity'. Cannot convert value "MAILBOXDB01" to type"Microsoft.Exchange.Configuration.Tasks.DatabaseCopyIdParameter". Error: "Cannot convert hashtable to an object of thefollowing type: Microsoft.Exchange.Configuration.Tasks.DatabaseCopyIdParameter. Hashtable-to-Object conversion is notsupported in restricted language mode or a Data section."    + CategoryInfo          : InvalidData: (:) [Get-MailboxDatabaseCopyStatus], ParameterBindin...mationException    + FullyQualifiedErrorId : ParameterArgumentTransformationError,Get-MailboxDatabaseCopyStatus    + PSComputerName        : SERVER01.mcsmemail.de

The interesting part to note is conversion is not supported in restricted language mode

PowerShell Supported Language Mode

The supported language mode is configured in the application settings of the PowerShell virtual directory of the Exchange Back End website.

Exchange 2013 PowerShell Virtual Directory Application Settings

The application settings after Exchange Server 2013 CU11 update:

Exchange PowerShell Virtual Directory PSLanguageMode - RestrictedLanguage

Running PSLanguageMode with the value RestrictedLanguage is the default setting. You should change this setting only if you encounter PowerShell issues.

Double-click PSLanguageMode and change the value to FullLanguage.

Exchange PowerShell Virtual Directory PSLanguageMode - FullLanguage

I have not validated why a clean Exchange 2013 CU11 setup does not show this behavior. A plain Exchange 2013 CU11 setup executes the script without any issues.

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