www.GroupDAV.org states: GroupDAV is an effort to create a "down-to-the-earth" protocol to connect OpenSource groupware clients with OpenSource groupware servers.
A major goal of GroupDAV is to keep the protocol as simple as possible and to stay focused on real world issues with OpenSource and free software applications.
EGroupware has GroupDAV support from version 1.4.003 on.
GroupDAV, CalDAV, CardDAV (and WebDAV too) needs HTTP Authentication. From EGroupware 1.8 on $_SERVER[ORIG_PATH_INFO] and $_SERVER[Authorization] is automatically used, so PHP via FastCGI? should work.
Latest eGw (1.8.004) is highly recommended as there are many bug fixes for GroupDAV, CalDAV, CardDAV. There is a patch for 1.8.004 preventing dulicates ics file names while copying events. Search there.
Clients supporting GroupDAV and experiences with eGW's implementation
Outlook connectorRecommended solution is iCal4OL.
Thunderbird addressbookThe Canadian company inverse has developed a GroupDAV plugin for Thunderbird. It can be downloaded from their website, where it's called SOGo Connector. EGroupware requires at least the version 3.103!
Use the following URL: https://example.org/egroupware/groupdav.php/addressbook/
Lightning (Thunderbird) and SunbirdWorks well with CalDAV
For the calendar, use the following URL: https://example.org/egroupware/groupdav.php/calendar/
For tasks, add a separate calendar with the following URL: https://example.org/egroupware/groupdav.php/infolog/
Apple iCal (Mac, iPhone, iPad)Works with CalDAV. Please note you have to create an account in iCal under preferences, to be able to use CalDAV (CalDAV is NO iCal server!). For automatic detection of the URL you have to create an redirect in your document root. It is documented in the groupdav.htaccess file in your EGroupware root.
Apple Addressbook app (Mac, iPhone 4.0+, iPad 4.2+)Works with CardDAV (addressbook). In order to allow Addressbook to automatic detect the URL of your EGroupware installation (at least iPhone user interface does NOT allow to manually specify it), you have to create an redirect in your document root. It is documented in the groupdav.htaccess file in your EGroupware root.
Android (tested on an HTC Desire - Android 2.3.7 - CyanogenMod? 7.1.0)Works well with CalDAV (2 ways sync).
Tried some of the apps and find CalDAV-Sync beta the best of them while not (yet ?) free nor (yet?) open source. But it really worth 2€ ! See the auteur's site for features and for parameters. group and personal calendars access. Infolog too, but I didn't try to display them. Should work from Android 2.2 to 4.0 .
Works well with CardDAV (2 ways sync).
Tried some of the apps and find CardDAV-Sync free beta the best of them. Add Contact Editor Free too and use it to add/modify cards. Pro versions of the apps do exist and allow more fields (organization...) to be synchronized. See the auteur's site for features and for parameters. Adapt date formats regarding date parameters.
KDE Kontact / KOrganizersome tests during the development. Use the URL: https://example.org/egroupware/groupdav.php/ Kontact detects the folders for contacts, events and tasks itself.
Funambol ConnectorWorks well, see bionicmessage.net
EvolutionSome people reported it working via GroupDAV. No own (RalfBecker) experience.
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