I modified http.conf adding:
Alias "/ caldav" "/var/www/html/group-office.com/modules/caldav/calendar.php"
if I call 192.168.10.215/caldav
login with user and password is opened, entering the groupoffice credentials and accessing the web page.
If I try to configure exchange from android I can't log in to the server. The phone is in wifi, if I try to open the web page 192.168.10.215/group-office from the phone browser, it opens it.
I am stuck here, can you help me?