I've been experimenting with Calendar Server 2.4 on (Slackware) Linux (13.0), and would like to compare notes. I'm using only SSL and have provided a self-signed certificate - I'd need to stump up some money for something better. I'm using accounts.xml just to experiment with. Evolution 2.62.2 seems fine as "user01" (or anyone else), but with Sunbird 1.0b1 (though Sunbird is obsolescent) and also in Thunderbird 3.0.4 with Lightning 1.0b1, I've fallen foul of Bug 523555 - "Cannot add CalDAV calendar via HTTPS if server has invalid/self-signed certificate" - https://bugzilla.mozilla.org/show_bug.cgi?id=523555 - fixed in development code on the 27th March, apparently. I had iCal 4.0.2 working fine on Mac OS X 10.6 without SSL with Calendar Server 2.3, but now with 2.4 when I try: iCal -> Preferences -> Accounts and click "+", and following http://support.apple.com/kb/HT3861 for rough guidance, I see: Page "Add an account" - - - - - - - - - - - Account type: CalDAV User name: user01 Password: user01 Server address: https://calendar.mydomain.tld:8443/calendars/users/user01 Create. Verifying ... "No CalDAV server was found at the specified address." Continue. Page "Calendar Server Options" - - - - - - - - - - - - - - - Account Template: iCal Server User name: user01 Password: user01 Server address: https://calendar.cs.york.ac.uk Server path: /calendars/users/user01/ Port: 8443 Use SSL: yes Create. "The account information was not found. Async operation timed out". Nothing visible in calendar server error log while this is going on, debug level = "info". Next step is Kerberos, once I find a fix or a work-around for the above problems. John A. Murdie