Using MAPI w/ C++, how can I open another user's Inbox? - exchange-server

I'm looking to write an automated monitor script to programmatically retrieve information from another user's Exchange 2003 inbox. I have working C++ code to log into MAPI and connect to my own inbox. I can also use the Control Panel->Mail applet to configure another user's mailbox into my profile, and my code can access that way. However, this was done on my desktop with Outlook installed, which provides a richer mail profile editor.
Since this will run on a server, I'd prefer not to install Outlook at all. Instead, I can install the MAPI client. I then create a simple MAPI app that pops up the mail profile wizard using MAPILogonEx() with the MAPI_LOGON_UI flag. However, the basic MAPI client doesn't have the features to configure another user's mailbox. As a requirement, I can only run this script as the service account of the monitoring application, so I cannot tell it to run as the account whose mailbox I want.
Is it still possible to connect to another user's mailbox (assuming permissions are already granted) using the basic MAPI client? Or is it absolutely necessary to install Outlook for this functionality?

I would strongly recommend using the Microsoft Exchange MAPI Client (as you have linked). It is engineered to be far more robust than the Outlook version of these libraries. You should find the API no different between Outlook and Exchange Server with respect to Extended MAPI.
You will need to use Extended MAPI (as described by Cain T S Random) to open other mail stores, and of course your application will need to be logged in as the Windows user with appropriate permissions on the Exchange server.

I see... I'm not sure how to do that explicitly; that's usually a side effect of calling CreateStoreEntryID with the wrong flags. What's you're looking to do is probably:
Get an IID_IExchangeManageStore from your default message store
Call CreateStoreEntryID
Then open that store by the entry ID
LPEXCHANGEMANAGESTORE mapiObject = NULL;
store->QueryInterface( IID_IExchangeManageStore, (LPVOID *) &mapiObject);
mapiObject->CreateStoreEntryID( server, mailbox, OPENSTORE_TAKE_OWNERSHIP |
OPENSTORE_USE_ADMIN_PRIVILEGE, &len, &buffer);
//Call OpenEntry on the entry id
If you want a more detailed example, search the source of the MFC MAPI project for CreateStoreEntryID. If you have other questions, the best place to get them answered is the microsoft.public.win32.programmer.messaging newsgroup.

Have you looked into ConfigureMsgService? I believe that works with Exchange MAPI, or are you saying you tried that and it didn't work?

Related

Outlook deferredDeliveryTime goes to outbox and If application is closed it does not send

I am building an Outlook Add-in that is using the Outlook mailitem property deferredDeliveryTime in order to postpone the sending of the message. Everything works fine but I have realized that if I send an email using deferedDeliveryTime and the application is closed it won't send the email until the application is reopened which defeats the purpose of the add-in. I am using Exchange/Office 365 and should therefore be able to push the message to the messaging queue and then close the application but I don't know how to do this.
One solution I have found is disabling the "Use Cached Exchange Mode to download email to an Outlook data file" in Account Settings. When disabled it sends the message immediately to the Exchange server but I need this setting to be enabled due to group policy.
I believe it should be possible to have it enabled while still being able to immediately send to Exchange. Do anyone know how/if this works? Or if there is some workaround.
You are on the right avenue, Outlook add-ins work only when the host application is launched. When you deal with a cached mode of connecting to the Exchange server your data is kept locally until Outlook synchronizes its folders. The non-cached mode works a bit different - the data is reflected from the server-side and no cache is preserved locally, your changes are reflected on the server-side almost immediately. It seems you have found a possible workaround already.
But you may also consider using EWS when Outlook is closed at any point of time, see Explore the EWS Managed API, EWS, and web services in Exchange for more information. For Office365 accounts you may take a look at MS Graph.
I have not tried that particular scenario, but you should be able to create a message in the online mode and send it in that mode. On the Extended MAPI (C++ or Delphi only) level, you can open the parent folder (e.g., Outbox) with the MAPI_NO_CACHE flag, create the message (IMAPIFolder::CreateMessage), populate its properties, and send it (IMessage::SubmitMesage) - since the parent folder is opened in the online mode, the newly created message will also be in the online mode.
If Extended MAPI is not an option, you can try to use Redemption (I am its author, any language) - it will let you open a folder in the online mode (RDOSession.GetFolderFromID(..., MAPI_NO_CACHE | MAPI_BEST_ACCESS)).

Exception thrown when user attempts to create an appointment in a shared calendar

We have an In-house executable which creates Outlook Meetings and Appointments in shared calendars.
One user is having a problem creating appointments in a shared calendar using this code. This code's been running fine for years now.
WHAT HAS BEEN TRIED:
I had the user access the Calendar directly through Outlook. She was able to create meetings in the Shared Calendar without a problem.
EXCEPTION THROWN:
"The operation failed because of a registry or installation problem. Restart Outlook and try again. If the problem persists, reinstall."
Re-installing Outlook would be a major inconvenience for the user.
I'm wondering.
What area in the Registry would I look at?
Would recreating the .PST file be a reasonable alternative?
Can I use Outlook Redemption to troubleshoot the user's account?
It seems your Outlook profile (or Outlook installation itself) is corrupted. You can take a look at the Windows event log what else Outlook states about the error incident. At this stage, it is not clear whether it is related to the profile corruption (to re-create a pst) or Outlook itself.
Redemption is a wrapper around Extended MAPI (a low-level API on which Outlook is built on). But it doesn't provide any self-diagnostic services, only convenient access to the low-level functions. However, you can use Redemption for getting your job done without Outlook involved.
I'd suggest opening a support case with Microsoft if you need to continue working with OOM.
It turns out that it was a data issue.
I asked the user to create Appointments for other shared calendars using our custom executable. She was able to do so without a problem.
The exception message that I posted came from the call to GetSharedDefaultFolder
The Recipient parameter was created using an email address that doesn't exist on our Exchange server. That bad email address came from our database.

How can I preserve IMAP flags (Forwarded, user flags) when migrating to Office 365 ?

We have a heterogeneous collection of mail clients (Thunderbird, Apple Mail, Squirrelmail, Outlook etc.) on different platforms (Linux, Mac, Windows, Android) using a UW IMAP server, which supports FLAGS and PERMANENTFLAGS. Thunderbird uses them for junk control, all clients use $Forwarded, and many users use them for mail management (tagging messages with categories such as "Important", or colouring them.
We are trying to migrate to Office365. As far as I can tell, the Office365 IMAP server does not support PERMANENTFLAGS at all, but the Web interface and Outlook client do support "Categories", which from a user perspective are the same thing (they could tag their message "Important" and colour it red).
Are there any tools which would perform this migration, perhaps using MAPI or EWS on the Office365 side ?
Also, I have been getting inconsistent results migrating just the legacy IMAP flags (Answered, Flagged) which Office365 does support - often if I copy folders with IMAP the flags are visible with an IMAP client, while if I copy folders with Outlook or the Office365 batch migration tool, the flags are visible with Outlook or the Office365 web portal. Are there any reliable migration tools which will set flags properly ?
Regarding migration of standard legacy flags, I found a recipe using two passes of the open-source tool imapsync - one pass to sync mailboxes without flags, and a second pass to set the flags.
For conversion of user flags, I modified an existing tool "mixfix" I had written to repair UW MIX format mailboxes. The script adds X- mail headers for each user flag, so that a message might have X-Flag-Important: True.
In Outlook, I can write a rule to set an email category based on a message header, and so by downloading and running a ruleset on a given folder, finally migrate Thunderbird tags to Outlook categories. It must be run on a desktop Outlook client, though - the rules will not run on the server.

MAPI access to Exchange Server 2010 vs EWS

I am trying to access some room mailbox information from a web application while connecting to Exchange Server 2010. Using the EWS, I am unable to get some AD properties such as room capacity or customly defined properties for the given rooms. However, querying directly through LDAP is not an option since the web application is external and has no access to any domain controllers.
From what I saw, a viable option would be to use MAPI in order to get the contacts from Exchange and then look for the given properties. In order to perform this kind of integration, I have the following questions:
1) Is it possible to use a standalone version of the MAPI interfaces - i.e. without Outlook installed - ?
2) Can MAPI client functions and objects be used from a server environment - i.e. no user input available - ?
3) Is there any way to use MAPI from managed code - C# or others - ?
4) Are there any other options of getting the aforementioned properties from Exchange?
1, 2 & 3) Yes. I use Redemption library for this
4) I only know about EWS & Mapi, so I think there is no other way.
Note: Before going ahead you should be sure these information are available from MAPI. Because Exchange is different from Active Directory.
This SO question may help you.

Sending Tasks using an offline Outlook

I've a scenario wherein I need to send/assign tasks from my browser UI to the concerned. This should happen with Outlook being offline (or for that matter outlook not even configured on the terminal) so that the user can be accessing a workflow from any terminal (using his/her AD credentials) and if required should have the ability to send a task to the concerned without having to return to his own terminal to be able to do so.
I envision that the user's credentials should be used to look up the AD for his/her email ID and send a task using the same from anywhere in the intranet.
Using Outlook object library I have been able to assign/send tasks, but with the Outlook being fired up and not otherwise.
Redemption does the sync of contacts while Outlook is offline but not tasks.
Kindly help if anybody has had a chance to do something similar.
Thanks in advance.
Redemption could help you here as you can run it it on a web server which will connect to you exchange env via mapi for you.
There are other ways dependant on you version of exchange EWS or Exchange DAV.
EWS comes with a managed API now a days to take some of the sting out of it.
There are similar 3rd party libraries for Exchange DAV as well.
They all contain contact and directory lookups.

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