$rcmail_config['cal_admins'] = array("alainpp@mydomain.com", "myfriend@mydomain.com");
I understand now this line. Sorry about that.
I noticed that the user in the calendar database is not created when you login in myroundcube. It ask for the password one more time when you click in the calendar icon and then it creates the user. But i get a "The address is not valid" error, but when you click again on the calendar icon it creates the user and logins.
This error point to this URL:
res://ieframe.dll/syntax.htm#https:///?_plugin=calendar,process&url=/edit_user.php?user="md5user"
"md5user" is the 25 user character converted.
I mean, is not big deal, because it works after that, but i think it should be corrected.
One more thing, i though the iframe were eliminated... i still see the calendar inside a frame.