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List:       kolab-devel
Subject:    Re: [Kolab-devel] Calendar events sent to Outlook client do not work
From:       Thomas Brüderli <bruederli () kolabsys ! com>
Date:       2014-01-06 9:08:08
Message-ID: 52CA7278.3090803 () kolabsys ! com
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Thomas Brüderli wrote:
> Thomas Brüderli wrote:
>>>>> I can confirm that the invites work in Outlook 2010, but they don't
>>>>> work in Office 365, Exchange 2010 OWA, Exchange 2007 OWA, Exchange 
>>>>> 2003
>>>>> OWA, Outlook 2007 or Outlook 2003. OWA 2007/2010 and Office 365 
>>>>> actually
>>>>> renames the event.ics file to "not supported calendar message.ics".
>>>> It's great that MS keeps their product generations in sync :-)
>>>>> Let me know about the patch, I can test against all the Outlook
>>>>> platforms pretty quickly now that I've got my accounts all setup. :-)
>>>> Please find attached a patch that adds the Content-class: header. If
>>>> that doesn't help, we can try the Gmail way and add the ics part with
>>>> Content-Type: application/ics
>>> I applied the patch but this still doesn't seem to work with Outlook 
>>> 2007 or OWA 2003. I haven't tested with the other versions yet. I can 
>>> confirm that the Content-Class header shows up in the headers of the 
>>> Outlook message. I think that Gmail's method seem to be the way to go at 
>>> this point.
>> Dammit!
>>
>> Will you be able to manually compose a MIME message source with ICS data
>> from Kolab that will work with all Outlook versions? I fear that our
>> process of me writing a patch => you testing => reporting back that stuff
>> is still broken doesn't scale...
> 
> Hello again
> 
> I now managed to install an Outlook 2003 and test various invitation
> messages sent by Kolab, Google and others as well as trying manually
> composed iTip messages. And the solution to make these work in Outlook <
> 2010 is to use Content-Type: multipart/alternative instead of
> Content-Type: multipart/mixed. It's as simple as that :-)
> 
> Now we still have to test whether changing the Content-Type will have
> some negative side-effects for other clients. For the time being, please
> find attached a patch that will fix your current Kolab/Roundcube
> installation to work with Outlook.

And I now found a problem with this multipart/alternative change:
Thunderbird doesn't list the .ics part as an attachment unless Lightning is
installed. Now we have two clients with conflicting behavior...

~Thomas
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