Develop Reference

Outlook vsto - properties handling

i have a problem with MailItem properties in a Outlook VSTO. I add some custom properties to a previously exported .msg mail with e.g. redemption in the following way:
SafeMailItem smi = new SafeMailItem {
Item = mailItem
};
int propertyId = smi.GetIDsFromNames(PROPERTY_GUID, "anyID");
smi.Fields[propertyId] = propertyString;
This property is removed and i cant find it again if i click on sending the mail. I checked this with Outlook Spy and before i send the mail the property is available but after i click on send (and e.g. cancel the send) the property is gone.
I also tried to call MailItem.Save() (at any time) but it has no effect apart from the fact that the .msg file includes the mail edits :). The same behavior is given if i use MailItem.PropertyAccessor directly.
Can anybody explain me why the properties are removed and how to fix this issue?
Thanks a lot for support
Outlook version: 16.0.0.13530 (64-bit); Visual Studio Professional 2019 16.8.4

How to capture sent items with Outlook addin across multiple accounts?

I have built an Outlook 2010 Addin using C#. I created an Inspector wrapper and I am using it to capture when an item is added to the Sent Items folder.
I then capture some details about that item and do something with it.
It's been working great, but I've recently come across someone who has multiple email accounts in Outlook. My addin seems only to capture the items from 1 of the sent item folders.
sentfolder = this.Application.Session.GetDefaultFolder(Outlook.OlDefaultFolders.olFolderSentMail);
sentitems = sentfolder.Items;
sentitems.ItemAdd += new Outlook.ItemsEvents_ItemAddEventHandler(sentitems_ItemAdd);
_wrappedInspectors = new Dictionary<Guid, InspectorWrapper>();
_inspectors = Globals.ThisAddIn.Application.Inspectors;
_inspectors.NewInspector += new Outlook.InspectorsEvents_NewInspectorEventHandler(WrapInspector);
Obviously I just need to iterate through the folders for the different accounts and identify each of the sent items folders but I am unsure how to achieve that.

If the user has multiple email accounts, the Session.Stores or Session.Accounts should provide access to the other shared mailboxes they use.
See this related SO post on how to get access to shared mailboxes.

Setting Outlook signature for multiple accounts

I am in the process of writing an application that sets a signature based on pre-acquired data for each Microsoft Outlook account(a user may have multiple Outlook accounts for various purposes).
I am able to set a signature for the default account, but I have yet to find how to set a signature for each Outlook account individually. I have done a lot of my own research and poked around the Microsoft.Office.Interop objects without much luck.
Is there a way to achieve this?

To choose the Outlook profile programmatically, you just use
Microsoft.Office.Interop.Outlook.Application App =
new Microsoft.Office.Interop.Outlook.Application();
NameSpace mapi = App.GetNamespace("MAPI");
mapi.Logon(profileName);
obviously setting the profileName to what is shown in the dropdown list upon starting Outlook (if you do not set a default profile in the control panel email settings).
This however is problematic in a number of ways since Outlook does not support multiple sessions even though the MAPI logon does:
http://msdn.microsoft.com/en-us/library/bb219914(v=office.12).aspx
Meaning: if Outlook is already running, you can even set NewSession to true, but it won't help. It will give you the currently-logged-in profile regardless of what name you set. If you have an Outlook zombie (I got that while testing, check with task manager), i.e. an Outlook without an UI showing up, the problem is the same.
If you can ensure Outlook does not run while doing stuff with signatures, you should be fine though.

Bypass "Program is trying to access ... Outlook" Dialog Box

I'm facing one issue while writing Office Outlook 2007 Add-In, I'm accessing the email contents of email currently being sent by capturing Send event. Everything works fine but when accessing the subject/body of the email through Outlook.MailItem object (in C#), it prompts a dialog box to allow/deny this program to access. Can anyone help how to bypass this dialog box and allow the program to access MailItem ?
Thanks
Safiullah

I don think it is possible, MSFT has placed this alert box to avoid an illegal mail box access by malicious program... However, following guys claim that they can by-pass:
http://www.ablebits.com/programming-outlook-security/index.php

C# opening up a blank email with an attachment using Exchange

I'm new to the world of C# programming but was hoping someone could help me out.
I'm trying to use C# to open up a blank email in Outlook with a specified attachment.
In other words, open the email, the TO: and SUBJECT: fields are blank but the email has an attachment that is specified in my code. I want my user to be able to modify the email and send to whatever users s/he specifies. I know for sure that we have Exchange....so any ideas?

There are a number of way you can do this.
Create an Outlook addin that opens a new mail with the attachment you want via say a new toolbar button.
Do the same in Outlook VBA macro ..
Also you could create a new form with the attachment in it already and then just us that form.(but the attachment will be hard coded etc.)
Does the attachment change ? or is it the same one evey time ? what outlook version are you using ? What are you programing capabilties ?
76mel

I don't think exchange will help you much, you need to work with outlook on the users machine. You can add a reference to the Outlook interop assemblies, should be in the Com tab of your add references dialog.
Here's some links to jump start you.
http://msdn.microsoft.com/en-us/library/microsoft.office.interop.outlook.aspx
http://www.microeye.com/resources/res_tech_vsnet.htm
Good Luck!