>>>>> "JD" == Jean-Christophe Delaye <Jean-Christophe.Delaye at eurecom.fr> writes: JD> Is Libical 3.0.0 supported with 3.0.5 ? Any idea ? It is not, but you can apply https://github.com/cyrusimap/cyrus-imapd/commit/1966c22fc4249a1157a4d4c1224138ce78653514 At least that's what I do in Fedora. - J<