The Executive Assistant can edit a meeting instead of replacing it

Asking the Executive Assistant to book a meeting without inviting anyone used to fail with an unhelpful "were unable to deserialize" — and because the message named nothing, the assistant would retry with guesses instead of fixing it. That request now succeeds, and when Microsoft does refuse something the assistant is told which field it objected to.

Amending an event is also no longer destructive. The assistant could previously only cancel a meeting and create a new one, with no way to read the existing agenda first, so "add one line to the notes" could quietly wipe everything already written there. It can now read an event in full and change just the parts you asked about, leaving the rest alone.

One timing bug went with them: a meeting requested with an explicit time-zone offset ("14:00 my time") was booked at that number of hours UTC, landing the invitation at the wrong hour.