You need to find the base naming context using the below command
ldapsearch -H ldap://10.10.11.168 -x -s base namingcontexts
After Getting Base naming Context
ldapsearch -H ldap://10.10.11.168 -x -b "DC=scrm,DC=local"
or
ldapsearch -H ldap://10.10.11.168 -x -s sub -b "DC=scrm,DC=local"
or
ldapsearch -H ldap://10.10.11.168 -x -s base -b "DC=scrm,DC=local"
# now you will get a lot of information to where you can find usernames and other information as well
#try to do grepping on it as well (grep -i pwd, svc,user,password,)like this