there is no form for updating.could you please tell how to update
username,password and server details:o:o
Just open the file ./config/main.inc.php in a text editor and edit the details there.
Usernames and passwords are stored on the IMAP server
no i have integrated with our site.i want users should have edit property to
change their username,password details.
How should RoundCube know how to work with your site integration? You have to write your own password script or try if some of the plugins around there (Plugin_Repository ? RoundCube Webmail (http://trac.roundcube.net/wiki/Plugin_Repository)) is suitable for you.