Reading Outlook PidNameContentType with Redemption.MAPIUtils.HrGetOneProp

Question

I'm using Redemption.MAPIUtils to read the content of the extended property PidNameContentType in an Outlook 2016 Email object.

This is my code:

Redemption.MAPIUtils MAPIUtils_l = new Redemption.MAPIUtils();
int ContentTypeTag_l = unchecked((int)0x8063001F);  
string Content_l;
Content_l = MAPIUtils_l.HrGetOneProp(NewMail_l.MAPIOBJECT, ContentTypeTag_l);

With this code I read the same content as OutlookSpy. OutlookSpy_Content

If I run the code in a Outlook 365 environment, the content is always empty. But OutlookSpy does show me exactly the same information.

What in my code do I have to change to read the value of PIDNameContentType in Outlook 365?

many regards Andreas

Answer 1

You are hardcoding a named property tag (0x8063001F) - it will only be valid in the mailbox the screenshot comes from from. You need to call MAPIUtils_l.GetIdsFromNames passing the GUID and the string id, "or" the returned value with 0x001F (PT_UNICODE), and only then use that tag to call HrGetOneProp.

Or you can use the DASL property name (OutlookSpy shows it) abd pass it to RDOMail.Fields[] in Redemption or MailItem.PropertyAccessor.GetProperty in OOM.