We have recently deployed a few custom Purview labels. These labels appear while composing a new message in Outlook and there is a choice of three options (internal, public, and confidential). We would like to read and set the drop down on behalf of the user, on the send event or dynamically, based on another event. We are using an older COM plugin written in C#. It looks like there's a way to handle this using a Office JavaScript API but I can't utilize that in our COM plugin. We also located a Nuget package for the MIP File SDK (Microsoft Information Protection) but I'm not sure that will accomplish are use case. I used OutlookSpy to check for a DASL property that might get set but can't seem to locate anything. Wondering if Outlook Redemption might be an option or perhaps another way.