@rakey Welcome to the Rockstor community. Could you take a peek in /opt/rockstor/var/log/rockstor.log for any clues; ie via:-
tail -f /opt/rockstor/var/log/rockstor.log
and then try configuring, via spanner, and activating the AD service again. Rockstor uses RedHat’s preferred system of sssd for the AD service. We have a wiki post on the internal workings that may also help.
Thanks.
Please feel free to paste elements of interest from the log in this thread as a starter.