Backup SSRS Encryption Keys Using Powershell - powershell-2.0

Question

I have made the following script from google for backing up the SSRS Encryption keys:
cls
$pwd = "sa#123#123"
$SSRSClass = Get-Wmiobject -namespace "root\microsoft\sqlserver\reportserver\rs_BPSSRS\v10\admin" -class "MSReportServer_ConfigurationSetting"
$key = $SSRSClass.BackupEncryptionKey($pwd)
$stream = [System.IO.File]::Create("c:\\SSRS.snk", $key.KeyFile.Length)
$stream.Write($key.KeyFile, 0, $key.KeyFile.Length)
$stream.Close()
But I'm getting the following errors:
Method invocation failed because [System.Object[]] doesn't contain a method named 'BackupEn
cryptionKey'.
At line:5 char:38
+ $key = $SSRSClass.BackupEncryptionKey <<<< ($results)
+ CategoryInfo : InvalidOperation: (BackupEncryptionKey:String) [], RuntimeEx
ception
+ FullyQualifiedErrorId : MethodNotFound
Exception calling "Create" with "2" argument(s): "Positive number required.
Parameter name: bufferSize"
At line:6 char:35
+ $stream = [System.IO.File]::Create <<<< ("c:\\SSRS.snk", $key.KeyFile.Length)
+ CategoryInfo : NotSpecified: (:) [], MethodInvocationException
+ FullyQualifiedErrorId : DotNetMethodException
You cannot call a method on a null-valued expression.
At line:7 char:14
+ $stream.Write <<<< ($key.KeyFile, 0, $key.KeyFile.Length)
+ CategoryInfo : InvalidOperation: (Write:String) [], RuntimeException
+ FullyQualifiedErrorId : InvokeMethodOnNull
You cannot call a method on a null-valued expression.
At line:8 char:14
+ $stream.Close <<<< ()
+ CategoryInfo : InvalidOperation: (Close:String) [], RuntimeException
+ FullyQualifiedErrorId : InvokeMethodOnNull
I'm using powershell v2. I tried finding about this but no luck. There are around 50+ SSRS servers in our environment and doing backup manually is tiresome. Hence, we came up with this automation. Kindly provide your comments.
Thanks

Answer 1

This piece of code should do the trick:
$ComputerName = "."
$KeyFolder = "C:\Temp"
$KeyPassword = "sa#123#123"
$TimeStamp = Get-Date -Format "-yyyyMMdd-HHmmss"
Get-WmiObject -Namespace "Root\Microsoft\SqlServer\ReportServer" -Class "__Namespace" -ComputerName $ComputerName |
Select-Object -ExpandProperty Name |
% {
$NameSpaceRS = $_
$InstanceName = $NameSpaceRS.SubString(3)
$KeyFileName = Join-Path -Path $KeyFolder -ChildPath ($InstanceName + $Timestamp + ".snk")
"Found Reporting Services in instance '$($InstanceName)' on $($ComputerName); will save key to '$($KeyFileName)' ..."
$SQLVersion = (Get-WmiObject -Namespace "Root\Microsoft\SqlServer\ReportServer\$($NameSpaceRS)" -Class "__Namespace" -ComputerName $ComputerName).Name
$SSRSClass = Get-WmiObject -Namespace "Root\Microsoft\SqlServer\ReportServer\$($NameSpaceRS)\$($SQLVersion)\Admin" -Query "SELECT * FROM MSReportServer_ConfigurationSetting WHERE InstanceName='$($InstanceName)'" -ComputerName $ComputerName
$Key = $SSRSClass.BackupEncryptionKey($KeyPassword)
If ($Key.HRESULT -ne 0) {
$Key.ExtendedErrors -join "`r`n" | Write-Error
} Else {
$Stream = [System.IO.File]::Create($KeyFileName, $Key.KeyFile.Length)
$Stream.Write($Key.KeyFile, 0, $Key.KeyFile.Length)
$Stream.Close()
}
}
The errors that you have mentioned are because your code is trying to fetch information from duplicate entries. Meaning, if you try the above code on the server where only one named instance of SSRS is running, then I suppose it will succeed. Just try this piece and give your comments.
CHEERS.