List all mailboxes a user has loaded in Outlook

Question

I am trying to list a user's shared mailboxes. We have a mixed environment so some are mapped automatically through Exchange, and some are not (security group permissions). I want to add a Powershell script to the login process to record all mailboxes a user has loaded in Outlook. I want to save this list to a text file or csv.

I am able to get the names through $outlook.getnamespace("mapi"). However some names have changed and the user's Outlook doesn't show those changes, so this name means nothing when thrown at Exchange or AD, however somehow still magically works.

I need something more concrete, samaccountname or smtp address.. something like that.

EDIT

I have continued to work at this, and with the help of MFCMAPI I was able to determine I need the PR_USER_NAME property. I need to do this with vanilla Powershell to run on a client system (and I have thousands so installing EMS is not an option).

Dmitry Streblechenko Dmitry Streblechenko · Accepted Answer · 2016-04-20T13:52:57

Use Namespace.Stores collection. MFCMAPI shows MAPI objects which you cannot access in PS. To see live Outlook Object Model objects, use OutlookSpy (it shows both MAPI and OOM objects).

UPDATE: If using Redemption is an option, you can use RDOExchangeMailbox.Owner property:

  skPstAnsi = 1
  skPstUnicode = 2
  skPrimaryExchangeMailbox = 3
  skDelegateExchangeMailbox = 4
  skPublicFolders = 5
  set Session = CreateObject("Redemption.RDOSession")
  Session.MAPIOBJECT = Application.Session.MAPIOBJECT
  for each Store in Session.Stores
    'for i = 1 to Session.Stores.Count
    'set Store = Session.Stores(i)
    Debug.Print Store.Name
    If (Store.StoreKind = skPrimaryExchangeMailbox) or (Store.StoreKind = skDelegateExchangeMailbox) Then
      Debug.Print Store.Owner.SmtpAddress
    End If
    Debug.Print " ------ "
  next

List all mailboxes a user has loaded in Outlook

1 Answers