Hi, I have successfully setup Cyrus IMAP 2.2.12 with GSSAPI / Kerberos as authentication for an AD domain "grt.citizen.co.jp", which is the default domain in /etc/imapd.conf. However, when I tried to add another AD domain "pvd.citizen.co.jp" other the default domain. The AD users in the latter domain, i.e. "pvd.citizen.co.jp", failed to authenticate from the e-mail client (e.g. Thunderbird). The error message on the server log :- Jul 2 17:56:39 imapsv01 cyrus/imaps[3777]: GSSAPI Error: Miscellaneous failure (Wrong principal in request) I checked with imtest and it passed successfully :- >imtest -m GSSAPI imapsv01.grt.citizen.co.jp The IMAP config. /etc/imapd.conf follows :- .... altnamespace: yes sasl_mech_list: gssapi pam loginrealms: pvd.citizen.co.jp virtdomains: yes defaultdomain: grt.citizen.co.jp sasl_pwcheck_method: saslauthd .... I hope someone could advise how I could make the IMAP to authenticate users from two or more AD domains. Thanks a lot. John Mok ---- Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html