Hi All, Issue in order to simplify mailbox enabling by Help Desk guys we decided to use cmdlet extension option with scripting Agent to achieve Archive mailbox enabling on the right Database. The issue is that as long as we do that action for one mailbox everything is ok. As long as you select several users, the first one runs OK the others fail with the following message: Warning: The cmdlet extension agent with the index 5 has thrown an exception in OnComplete(). The exception is: System.NullReferenceException: Object reference not set to an instance of an object. at Microsoft.Exchange.Configuration.MonadDataProvider.MonadCommand.set_CommandType(CommandType value) at Microsoft.Exchange.ProvisioningAgent.ScriptingAgentHandler.OnComplete(Boolean succeeded, Exception e) at Microsoft.Exchange.Provisioning.ProvisioningLayer.OnComplete(Task task, Boolean succeeded, Exception exception) Principle The idea was to let the scripting agent be triggered each time enable-mailbox cmdlet is called and enable the archive mailboxe, placing it on preselected database. Configuration we have 4 nodes DAG, 2 are for mailbox Database (std-mbx-01 to std-mbx-10) the remaining 2 are for Archive DB (arc-mbx-01 to arc-mbx-10) Debug Tracing for Debug Purposes, a Log File on a share is used to log some traces. Here is a sampole log file: 03/28/2011 13:01:06 : WGE1IN007P::Scripting Agent::OnComplete----------> 03/28/2011 13:01:06 : WGE1IN007P::Scripting Agent::Parameters Name : Identity Value : tcsgroup.ch/Users/Outlook07 03/28/2011 13:01:06 : WGE1IN007P::Scripting Agent::MailboxPostEnablingConfiguration running for tcsgroup.ch/Users/Outlook07 03/28/2011 13:01:06 : WGE1IN007P::Scripting Agent::DCCheck for WGE3DC001P 03/28/2011 13:01:06 : WGE1IN007P::Scripting Agent::DCCheck for WGE1DC001P 03/28/2011 13:01:06 : WGE1IN007P::Scripting Agent::DCCheck for WGE3DC003P 03/28/2011 13:01:06 : WGE1IN007P::Scripting Agent::Selected DC: WGE3DC003P 03/28/2011 13:01:06 : WGE1IN007P::Scripting Agent::Processing Mailbox Outlook07 Stored on STD-MBX-08 03/28/2011 13:01:06 : WGE1IN007P::Scripting Agent::Archive DB: ARC-MBX-08 03/28/2011 13:01:06 : WGE1IN007P::Scripting Agent::OnComplete----------> 03/28/2011 13:01:06 : WGE1IN007P::Scripting Agent::Parameters Name : Archive Value : True Name : ArchiveDatabase Value : ARC-MBX-08 Name : DomainController Value : WGE3DC003P Name : Identity Value : tcsgroup.ch/Users/Outlook07 03/28/2011 13:01:06 : WGE1IN007P::Scripting Agent::OnComplete Called with -Archive Parameter. exiting 03/28/2011 13:01:06 : WGE1IN007P::Scripting Agent::Setting Quota 03/28/2011 13:01:06 : WGE1IN007P::Scripting Agent::Completed /////////////////// Source Code <?xml version="1.0" encoding="utf-8" ?> <Configuration version="1.0"> <!-- In order to enable Scripting Agent: - rename this file to ScriptingAgentConfig.xml - edit it appropriately - run the task: enable-CmdletExtensionAgent "Scripting Agent" In order to include into your scriptlet characters prohibited in XML, use escape sequences, e.g. "&lt;","&gt;","&amp;" for "less than", greater than" and "ampersand respectively. --> <Feature Name="MailboxPostEnablingConfiguration" Cmdlets="enable-mailbox"> <ApiCall Name="OnComplete"> #parameter list: #param([ProvisioningHandler]$provisioningHandler, [bool]$succeeded, [Exception]$exception) if ($succeeded) { $identity = $provisioningHandler.UserSpecifiedParameters["Identity"].tostring() $computer = get-content env:computername $logfile = '\\wge1in007p\log\'+ (get-date -Format 'yyyy-MM-dd_hh-mm-ss') + '_' +$computer + '.log' "$(Get-Date) : $computer::Scripting Agent::OnComplete---------->" | Out-File -FilePath $logfile -Encoding default -Append "$(Get-Date) : $computer::Scripting Agent::Parameters" |fl | Out-File -FilePath $logfile -Encoding default -Append $provisioningHandler.UserSpecifiedParameters |fl | Out-File -FilePath $logfile -Encoding default -Append # enabling archive will recursively trigger the scripting Agent so we must check for this # Also if mailbox enabling is done while specifying -archive we must not try to enable it if ( $provisioningHandler.UserSpecifiedParameters["Archive"] -eq $True){ "$(Get-Date) : $computer::Scripting Agent::OnComplete Called with -Archive Parameter. exiting " | Out-File -FilePath $logfile -Encoding default -append } else { "$(Get-Date) : $computer::Scripting Agent::MailboxPostEnablingConfiguration running for $identity" | Out-File -FilePath $logfile -Encoding default -append # Set exit condition while looking for the DC that has been used to enable the mailbox $mbx = $null #cycle through DCs $DClist = Get-DomainController -DomainName 'tcsgroup.ch' | where {$_.adsite -eq 'tcsgroup.ch/Configuration/Sites/HQ-Production'} foreach ($DC in $DCList) { "$(Get-Date) : $computer::Scripting Agent::DCCheck for " + $dc.name | Out-File -FilePath $logfile -Encoding default -append $mbx = Get-user $identity -DomainController $dc.name # this is the DC on which mailbox enabling has been run or a DC that has replicated if ($mbx.RecipientType -eq 'UserMailbox') { $dcName = $dc.name $mbx = Get-Mailbox $identity -DomainController $dcName break } } if ($mbx -ne $null) { "$(Get-Date) : $computer::Scripting Agent::Selected DC: $DCName" | Out-File -FilePath $logfile -Encoding default -Append "$(Get-Date) : $computer::Scripting Agent::Processing Mailbox " + $MBX.DisplayName + " Stored on " + $MBX.database.name | Out-File -FilePath $logfile -Encoding default -Append # we only take care of Mailboxes that are created on databases named XYZ-MBX-nn if (($mbx.ArchiveName.Count -eq 0) -and ($MBX.database.name.substring(3,5) -eq '-MBX-')) { $DBIndex = $MBX.database.name.substring($MBX.database.name.length - 2, 2) $ARCDB = "ARC-MBX-" + $DBIndex "$(Get-Date) : $computer::Scripting Agent::Archive DB: $ARCDB" | Out-File -FilePath $logfile -Encoding default -Append Enable-Mailbox $identity -Archive -ArchiveDatabase $ARCDB -DomainController $DCName "$(Get-Date) : $computer::Scripting Agent::Setting Quota" | Out-File -FilePath $logfile -Encoding default -Append set-mailbox $identity -ArchiveQuota 2GB -ArchiveWarningQuota 1.8GB -DomainController $DCName "$(Get-Date) : $computer::Scripting Agent::Completed ///////////////////" | Out-File -FilePath $logfile -Encoding default -Append } } } } </ApiCall> </Feature> <Common> </Common> </Configuration> Any help will be apreciated. Regards