I've come across this question during interview as Sys Adm.
"How you reset lost root/superuser password on x86 system running solaris (8/9/10) which remotely located. (Not locally in front of you)"
As much as I know, you must be physically in front of the server to reset the lost root/superuser password.
Any idea?
If you got option to boot the system from net in single user mode I am sure you can rectify the issue by mounting the disk on /a and modifying the /a/etc/shadow file.
thanks kumar,
i do agree to boot from net but given a situation where superuser password unknown to you & you unable to reboot/shutdown the server remotely using other account that allowed to shutdown/reboot the server. Without that we can't boot from net/cdrom then, right?
other possible way?
You may be interested to read this peice of info.
I had to do this once... so got this.... 
As on when I boot it from CDROM, it never ask for any password, and I think once you boot it from any server which is working as boot server I think ideally it shouldn't ask for password, because you are not logging to that system you are taking help of that system to boot some other system in environment . Isn't?
I am sure you are at the right place and you will be getting better view then mine