Guests do not receive meeting start notifications or calls when invited via calendar

There is no notification about the start of the meeting for conference participants with the "guest" status. There is no call.

When a meeting is created through the calendar, all participants are automatically assigned the "Guest" status. These guest participants do not receive a notification or call when the meeting starts. Additionally, during the meeting, only the participants' email addresses are displayed with the label "Guest".

Steps to reproduce

1. Create a meeting using the calendar.
2. Add participants to the meeting.
3. Wait for the meeting start time or manually start the meeting.

Expected behaviour

All participants should receive a notification or incoming call when the meeting starts, regardless of their "Guest" status. Their full names should also be displayed in the participant list, not just email addresses.

Actual behaviour

Participants with "Guest" status do not receive any meeting start notification or call. Changing participant roles to “Chairperson”, “Required”, or “Optional” has no impact on this issue.

Nextcloud version: 30.0.13 - 30.0.13.1 |

• spreed: 20.1.9
• calendar: 5.3.7

No files, tests, or entry points are identified in the report. First reproduce the calendar-created meeting with guest participants and compare notification, call, and participant-name behavior with the expected results. Done means guests receive the meeting start notification or call and participant names are displayed instead of only email addresses.