Guys, I am sending you a patch to change to change the password based on LDAP, to version 2.0 stable. I hope I have helped.
http://www.tiagogomes.eti.br/roundcube-mail-patch-change-password-on-ldap-authenticate-v20-stable/
Thanks
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Tiago Gomes Pereira http://www.tiagogomes.eti.br
LPI Certified
LPI ID - LPI000129445
IT Service Management - ITIL FOUNDATION V2
ID - SR341901
algodas@gmail.com