Is recordAutomatically: true with allowRecording: false a supported combination? (Graph API transcript-only meetings)

We use app-only Graph to arm scheduled Teams meetings for transcription. Our goal is

transcript only — we do not want a recording to be created.

We PATCH /users/{userId}/onlineMeetings/{meetingId} with:

{

"recordAutomatically": true,

"allowTranscription": true,

"allowRecording": false

}

The results are inconsistent across otherwise identical meetings.

• Sometimes a transcript is produced and /onlineMeetings/{id}/transcripts returns it.
• Other times, transcription is visibly running in the Teams client for the entire call,

but when the meeting ends Teams posts "Recording stopped and wasn't saved as it was too

short" along with a 2-second recording, and no transcript is ever created. Recap shows

"No transcript available" and /transcripts stays empty indefinitely. Same settings, same

organizer, same tenant, a 32-minute call.

Our current reading is that recordAutomatically is the only automatic-start property in

Graph and that it starts a recording, so combining it with allowRecording: false puts the

meeting into a state that was never defined.

Questions:

1. Is recordAutomatically: true together with allowRecording: false a supported combination? If it isn't, is the expected outcome that no transcript is produced?
2. MC1283816 introduced a "Transcribe only" automatic meeting setting in the Teams UI. Is there a Graph equivalent, in v1.0 or beta, to set it programmatically? I don't see a corresponding property on onlineMeeting or onlineMeetingBase.
3. If there isn't one, is allowing the recording currently the only supported way to get an automatic transcript?

Two things to rule out up front:

• These are calendar-backed scheduled meetings, created via POST /users/{id}/events with isOnlineMeeting: true and onlineMeetingProvider: teamsForBusiness. They are not ad-hoc meetings created through POST /onlineMeetings.
• Permissions and the application access policy are configured correctly: OnlineMeetingTranscript.Read.All is granted, and fetching works normally for the meetings that do produce a transcript. The failing cases return an empty collection, not a 403.