Currently working on a VBScript to automate some of the dirty PST ingestion work I do, and I've found something problematic after upgrading from Outlook 2003 to 2007.
(Had to upgrade to get around a RTF Body issue in OL2003 ..)
Even after you instruct Outlook to close the PST store, Log off and then destroy the object (set objNS = Nothing, etc.), Outlook still hangs around for 1-30 seconds depending on the size of the PST files I'm working with.
I can easily workaround and put in a delay (Wscript.Sleep(300)) but I find this dirty and don't trust it completely ... any ideas on how to get Outlook to close properly?
I have also tried polling for the instance via GetObject() but it seems that it returns False even when OUTLOOK.EXE is still visible in Task Manager.
Code I'm using below:
Function TestPSTInOutlook(strFileName)
' Open PST in Outlook then closes it, primarily to determine
' if Outlook has any difficulty in processing the PST in the
' first place.  Not interested in corruptions per message, just
' PST-wide (and passwords).
    Const olMailItem = 0
    Const olMSG = 3
    Const olDiscard = 1
    On Error Resume Next
    Dim objOL   ' Outlook.Application   
    Dim objNS   ' Outlook.Namespace
    Dim objFolder  ' Outlook.MAPIFolder
    Dim objIS  ' Outlook.Inspector 
    Dim objMail  ' Outlook.MailItem
    Set objOL = CreateObject("Outlook.Application")
    Set objNS = objOL.GetNamespace("MAPI")
    objNS.Logon
    objNS.AddStore strFileName
    If Err.Number <> 0 Then
     loggit_silent = True
     loggit("TestPSTInOutlook(): failed to open " & strFileName & " for reason: " & Err.Description)
     loggit_silent = False
     TestPSTInOutlook = False
    Else
     Set objFolder = objNS.Folders.GetLast
     objFolder.Name = strFileName
     Set objMail = objOL.CreateItem(olMailItem) 
     Set objIS = objMail.GetInspector 
     objIS.Close (olDiscard) 
     objMail.Close (olDiscard)
     objNS.RemoveStore objFolder
     loggit_silent = True
     loggit("TestPSTInOutlook(): success opening " & strFileName)
     loggit_silent = False
     TestPSTInOutlook = True
    End If
' BUG: Outlook 2007 refuses to shut down when told and takes its time - we have to wait otherwise we error  on trying to move the next PST file ...
' Does not exist in OL2003 but if we roll back then we don't get fixed Unicode PST support and degraded  ingestion performance
' 
    objNS.Logoff 
    objOL.Session.Logoff 
    objOL.Quit 
    Set objIS = Nothing 
    Set objMail = Nothing 
    Set objNS = Nothing 
    Set objOL = Nothing 
    Wscript.sleep(300)
End Function
NB: loggit() is purely a logging function (sends to stdout and to a debuglog.txt)