### Steps to reproduce

<br>

1. Login with a user who has permission to manage meetings

2. Subscribe to meetings using iCal subscription from your user account

3. Set up a one-time meeting for today (invite a users, schedule meeting)

4. Close this meeting.

5. Duplicate the meeting and schedule the duplicate (also a one-time meeting) for e.g. next week (open, invited users etc.).

6. Check your synced calendar (both meetings will be visible)

7. Wait a day.


### What is the buggy behavior?

<br>

* The closed ticket from the day before will not be visible in your synced calendar anymore.


### What is the expected behavior?

<br>

1. Begin of the insertion~~Past,End of the insertion Begin of the deletion Past,End of the deletion closed meetings are still visible in a synced Begin of the insertioncalendar.~~End of the insertion Begin of the deletion calendar.End of the deletion


Begin of the insertion<br>

1. One-time meetings that were effectively conducted (in\_progress or closed state) should remain visible in synced calendars for up to one month after their scheduled date;

2. Past meetings that were never started (open or draft state) are intentionally excluded from the feed after their date, as they represent meetings that did not take place.


_N.B. : Recurring meetings are unaffected by this change, as they are handled differently in the iCal export._

End of the insertion ###

### Screenshots and other files

<br>

Sadly none.

### Environment information

<br>

**OpenProject installation type**

* Hosted cloud edition

* Tested with Nextcloud calendar and Thunderbird calendar


**OpenProject version**

_17.1_

**Browser**

* [ ] Chrome
* [ ] Firefox
* [ ] Safari
* [ ] Mobile Safari
* [x] Other (Vivaldi)

**Operating System**

* [x] Windows
* [ ] Mac OS X
* [ ] Mobile iOS
* [ ] Mobile Android
* [ ] Linux (please specify distro)
* [ ] Chrome OS
* [ ] Other (please specify)

**Language**

_DE/EN tested_