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I've written a script that intends to retrieve the DatabaseSize of a database from Exchange 2010. I created a new AD user for this script to run under as a scheduled task. I gave this user admin rights to the Exchange Organization (as a last resort during my testing) and local admin rights on the Exchange machine.

When I run this script manually by starting powershell (with runas /noprofile /user:domain\user powershell) everything works fine. All the database properties are available. When I run the script as a scheduled task a lot of the properties are null including the one I want: DatabaseSize.

I've also tried running the script as the domain admin account with the same results.

There must be something different in the two contexts but I can't figure out what it is.

My script:

Add-PSSnapin Microsoft.Exchange.Management.PowerShell.E2010

Write-EventLog 'Windows PowerShell' -source PowerShell -eventid 100 -message "Starting script"

$databases = get-mailboxdatabase -status

if($databases -ne $null)
    Write-EventLog 'Windows PowerShell' -source PowerShell -eventid 100 -message "Object created"

    $databasesize_text = $databases.databasesize.tomb().tostring()

    if($databasesize_text -ne $null)
        $output = "echo "+$databasesize_text+":ok"

        Write-EventLog 'Windows PowerShell' -source PowerShell -eventid 100 -message "Path check"

        if(test-path "\\mon-01\prtgsensors\EXE\")
            Write-EventLog 'Windows PowerShell' -source PowerShell -eventid 100 -message "Path valid"
            Set-Content \\mon-01\prtgsensors\EXE\ex-05_db_size.bat -value $output

        Write-EventLog 'Windows PowerShell' -source PowerShell -eventid 100 -message "Exiting program"
        Write-EventLog 'Windows PowerShell' -source PowerShell -eventid 100 -message "databasesize_text is empty. nothing to do"
    Write-EventLog 'Windows PowerShell' -source PowerShell -eventid 100 -message "object not created. nothing to do"

exit 0
share|improve this question
Are you running this externally (using a remote powershell)? I've noticed that the .toMB doesn't work when running a remote shell, but it does if you run it directly on an exchange server. Frustrating issue. – user94533 Sep 13 '11 at 9:06
up vote 0 down vote accepted

Did you create a "Basic Task" or a "New Task"? You can set the security options for your task if you use "New Task" directly on the first page of the dialog.

share|improve this answer
Additionally, you might experience a bug, which can be resolved by a workaround using XML import/export. See… – Christoph Jan 13 '11 at 21:14
I had already created it using New Task and tried different variations of checking/unchecking the "Run with highest privileges" option but had never tried changing the "Configure for:" option to 2008 R2. It was set to 2008/Vista previously. – barophobia Jan 13 '11 at 21:24

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