Zimbra 8.0.6 - IOS and Android CalDAV issue

Paladinemishakal · Post by **Paladinemishakal** » Mon Oct 20, 2014 8:36 pm

Hi All,

I am using the Release 8.0.6.GA.5922.UBUNTU12.64 UBUNTU12_64 FOSS edition and I would like to find more information with regard to Zimbra + iPhone/Android + CalDAV.

As I am using the FOSS edition, I was recently informed that some of my users have a problem with using iPhone and trying to configure CalDAV to add calendar from their Zimbra account. After much searching, I have the following questions to ask here and hope some of you can assist me.

Questions:
1. I have various model of iPhone running different version iOS. Assuming I have iOS 5, iOS 6, iOS 7 and iOS 8. Does the iPhone implementation of CalDAV only support ActiveSync?
2. I can configure CalDAV from Zimbra on the iPhone but I noticed that the "invitees" option is not found in any of the above version of iOS, so what am I missing here?
3. With question 1 and 2 in mind, which ZCS is able to support the requirement?
4. Also I tried to configure CalDAV on my Android running 4.4.2 and I have installed CalDAV Sync Free Beta (http://www.appjenny.com/Android/App/org ... yncadapter) but when I tried creating a calendar entry with participant from some users in the same Zimbra email server, my users did not get any invitation. Is there something missing here?

Note: I am using Thunderbird with Lightning add-on and with the same CalDAV configured, I can send calendar invite and they will receive it.

Thanks & Regards.

Gren Elliot · Post by **Gren Elliot** » Tue Oct 21, 2014 4:20 am

The current released versions of Zimbra implement https://tools.ietf.org/html/draft-desru ... v-sched-03. Lightning and Mac OSX Apple Calendar up to Mavericks supported this method for adding scheduling capability to CalDAV but simpler clients like iPhone calendar and various Android clients/connectors don't. Yosemite no longer works correctly with draft-desruisseaux-caldav-sched-03 either.

Zimbra does not currently support https://tools.ietf.org/html/rfc6638 which works in a significantly different way. Many CalDAV clients do. The main difference between the standards is that in the old standard the client did most of the work whilst in the new standard, the server does most of it.

I am actively working on support for rfc6638 - see https://bugzilla.zimbra.com/show_bug.cgi?id=69984 if you want to monitor how it is progressing. I am very eager to see this supported

Just so you know, CalDAV and ActiveSync are completely different things - the first is an Open standard and the second is a Microsoft proprietary standard. Often, calendaring clients support both protocols though...

All the best,

Regards,

Gren

sergio77 · Post by **sergio77** » Tue Nov 18, 2014 3:18 am

Hi Elliot, are there any news about this boring situation? We are moving to another mail server solution for this problem... can you help us?

Gren Elliot · Post by **Gren Elliot** » Tue Nov 18, 2014 3:56 am

This feature is undergoing QA testing for the upcoming 8.6 release. https://bugzilla.zimbra.com/show_bug.cgi?id=69984 is currently in state Resolved/Fixed which means that development are happy with the feature. It will change to Resolved/Verified when QA are happy with it. If that happens it is highly likely to be included in 8.6.

Hope that helps,

Regards,

Gren