How to find out the distinguished name of the information store to feed to IExchangeManageStore::GetMailboxTable?

Question

There is a Microsoft knowledge base article with sample code to open all mailboxes in a given information store. It works so far (requires a bit of copy & pasting on compilers newer than VC++ 6.0).

At one point it calls IExchangeManageStore::GetMailboxTable with the distinguished name of the information store. For the Exchange 2007 Trial Virtual Server image it has to look like this:

"/o=Litware Inc/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Configuration/cn=servers/cn=DC1".

Using OutlookSpy and clicking on IMsgStore and IExchangeManageStore reveals the desired string next to "Server DN:".

I want to avoid forcing the user to put this into a config file. So if OutlookSpy can do it, how can my application find out the distinguished name of the information store where the currently open mailbox is on?

Answer 1

It'll be in Active Directory, so you'd use ADSI/LDAP to look at CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=example,DC=com. Use Sysinternals' ADExplorer to have a dig around in there to find the value you're looking for.

Answer 2

Thinking there must be a pure MAPI solution, I believe I've figured out how OutlookSpy does it.


The following code snippet, inserted after

printf("Created MAPI session\n");

in the example from KB194627, will show the Server DN.

LPPROFSECT lpProfSect;
hr = lpSess->OpenProfileSection((LPMAPIUID)pbGlobalProfileSectionGuid, NULL, 0, &lpProfSect);
if(SUCCEEDED(hr))
{
    LPSPropValue lpPropValue;
    hr = HrGetOneProp(lpProfSect, PR_PROFILE_HOME_SERVER_DN, &lpPropValue);
    if(SUCCEEDED(hr))
    {
        printf("Server DN: %s\n", lpPropValue->Value.lpszA);
        MAPIFreeBuffer(lpPropValue);
    }
    lpProfSect->Release();
}

Update:
There is the function HrGetServerDN in the EDK 5.5 source code, it extracts the Server DN from a given session's PR_EMS_AB_HOME_MTA. I'll try it if the other way turns out to be unreliable.

Answer 3

I'd download the source for MFCMapi and see how they do this.