[Resending and extending my original reply from July 10th - I only noticed now that Sunny had BCCed the mailing list] On Thu, 2013-07-11 at 01:09 +0530, Sunny wrote: That's expected - SyncEvolution and its underlying DAV library, neon, do not know how to use the new authentication mechanism. Yes, that's the highest priority item on my list of things to do for the upstream 1.4 release. I consider lack of that feature a release blocker. My current thinking is that I'll reuse the work done by different single-sign-on (SSO) services for authenticating against Google. That will be easier than trying to replicate that work and give a better user experience (integration into the system's credential and account handling) - if there is such a system. The downside will be that getting SyncEvolution up and running with Google without such a system will be impossible, unless someone from the community adds the code for a builtin authentication backend. More specifically, I intend to lay the foundation for plugable SSO backends and make it work in combination with gSSO (https://01.org/gsso). That is something that I can justify as part of my work on Tizen. Some developers from Ubuntu expressed an interest to make it work with Ubuntu Online Accounts, which has a very similar API. [ fast forward to September ] The current status is that I am one full test run away from including OAuth2 support in the master branch. That test should be complete after the weekend. A 1.3.99.5 beta release could follow middle of next week. This whole work got delayed a bit because it got mixed up with fixing FDO #66110 ("GTK-UI + D-Bus: password not stored in GNOME keyring or KWallet" https://bugs.freedesktop.org/show_bug.cgi?id=66110). Sorry for that! As originally planned, gSSO is one way of doing OAuth2. I have also added support for GNOME Online Accounts. However, only GNOME Online Accounts >= 3.10 (in freeze, not released yet) will have support for CardDAV (https://bugzilla.gnome.org/show_bug.cgi?id=707916). CalDAV is already possible since 3.8. There is a hacky way to add CardDAV to 3.8 binaries - see attached README. Ubuntu Online Accounts is not supported at the moment; I'm still hoping to get patches for that. Overall it'll be harder to users to get a working setup. Thus my question to users: how much do you depend on CalDAV and/or CardDAV sync with Google? On which platforms? -- Best Regards, Patrick Ohly The content of this message is my personal opinion only and although I am an employee of Intel, the statements I make here in no way represent Intel's position on the issue, nor am I authorized to speak on behalf of Intel on this matter.