Consider mastering ldapsearch
. This tool should be available on UNIX boxes these days. ADS is a great tool, but sometimes it gets in the way (constant entry reloads, etc).
For example:
ldapsearch -h hostname -p port \
-D bindDN -w bindPassword \
-b <dn-of-group> -s base \
'(&)' memberURL
If the difficulty is with Apache DS ... that's another story.