[Tickets #14772] CalDAV sync resalts in invitations even when SCHEDULE-AGENT=CLIENT selected

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Ticket URL: https://bugs.horde.org/ticket/14772
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  Ticket             | 14772
  Created By         | aria at bsc.gwu.edu
  Summary            | CalDAV sync resalts in invitations even when
                     | SCHEDULE-AGENT=CLIENT selected
  Queue              | Kronolith
  Version            | 4.2.23
  Type               | Bug
  State              | Unconfirmed
  Priority           | 2. Medium
  Milestone          |
  Patch              |
  Owners             |
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aria at bsc.gwu.edu (2018-01-26 21:42) wrote:

Hi,
When I setup an Outlook client to sync their calendar to Horde  
Groupware Webmail Edition (5.2.22) using Outlook CalDAV Synchronizer,  
if the client creates a meeting invitation using Outlook, the meeting  
invitation is sent both via Outlook (desired) and via Kronolith once  
the CalDAV sync is made.

I find multiple similar tickets, either related to new invitations or  
accepting an invitation that generates duplicate invitations from  
Kronolith.

I have enabled "Set SCHEDULE-AGENT=CLIENT" in CalDAV Synchronizer but  
apparently, this does not work with Horde according to  
https://sourceforge.net/p/outlookcaldavsynchronizer/discussion/general/thread/4f98e2e5/

Is there a solution to this problem?  If no, is there a way I can  
completely disable Horde automatic generation of meeting invitations?

Thanks,
Aria