Zimbra + CalDAV + Outlook = Error 403

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alien2108
Posts: 3
Joined: Sat Sep 13, 2014 3:22 am

Zimbra + CalDAV + Outlook = Error 403

Postby alien2108 » Fri Apr 21, 2017 8:27 am

Hey All!

We are using Zimbra 8.7.1GA1670 with Outlook CalDav Synchroniser to do sync of the Calendars over CalDAV. I did notice that Sync fails suddenly for some users with shared calendars with the following error in Zimbra:

dav - sending http error 403 because: Changing ORGANIZER of an appointment is not allowed: old='user@xxx.xx' new='new_user@xxxx.xx'

Now new_users@ has full access rights granted to the calendar of user@. I am not really sure why Organizer is being changed, but can I tell Zimbra somehow to allow that, since the user has full access rights anyhow?

I did notice a couple of other users had same issue in the past, bot no useful answer was found.


lethargos
Posts: 19
Joined: Thu Oct 20, 2016 12:32 pm

Re: Zimbra + CalDAV + Outlook = Error 403

Postby lethargos » Fri Aug 18, 2017 12:09 pm

Don't kid yourself. This forum is dead. If you don't pay for the commercial version, you kind of... don't matter :) I'd opt for a classical postfix/dovecot/amavis/spamassassin/clamd/roundcube whatever e-mail setup.
alien2108
Posts: 3
Joined: Sat Sep 13, 2014 3:22 am

Re: Zimbra + CalDAV + Outlook = Error 403

Postby alien2108 » Fri Aug 18, 2017 1:33 pm

Yeah...sadly I see exactly that....
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Gren Elliot
Zimbra Employee
Zimbra Employee
Posts: 175
Joined: Tue Jun 10, 2014 4:45 am

Re: Zimbra + CalDAV + Outlook = Error 403

Postby Gren Elliot » Fri Aug 18, 2017 1:54 pm

ORGANIZER changes are disallowed for 2 reasons
  • The calendaring standards don't allow it. (The correct method is to cancel the meeting and get the new ORGANIZER to create a new one)
  • In the past, bugs in calendaring clients combined with us allowing ORGANIZER changes have caused total havoc as ATTENDEEs hijacked the meeting to be their own, causing responses to be re-routed to the wrong user who wasn't expecting it.

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