[Kolab-devel] Calendar events sent to Outlook client do not work

[Thomas Brüderli]

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.

Regards,
Thomas
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