I'm following one of the posts that explains how to convert Planner users IDs to Display Names using "Get user profile (V2)"
However, I'm running into failures when the UPN is not a GUID. It's some string that looks like this:
ja1NMv8Bv0yH8DTxSDwK12UAPTX8
My list of User Ids are a mix of the above an GUIDs by the way. I find that odd, too.
How do I get display names that works for both GUIDs and the type above?