Question

I have to add values to some outlook contact fields using EWS. I’ve managed to do that with the ‘User Field 1’ using
this article
. The problem is that i need to insert values in other fields (for instance ‘Account’ in ‘Miscellaneous Fields’) and I need to know the id of these properties.
Here is the code i’m using to create the property, i need to set the second parameter:

Guid myGuid = new Guid("{00062004-0000-0000-C000-000000000046}");
ExtendedPropertyDefinition myDef = new ExtendedPropertyDefinition(myGuid, 0x804F, MapiPropertyType.String);

Answer 1

You were close, the PropertyId values are on the same MSDN article you referenced.

Account is PropertyId 0x3A00.

MFCMAPI is also your friend when looking for Property Names or Ids.