 
                         
                        We ended up doing it ourselves.
We exported the entire list of users from opendj, used a python script to create a modification LDIF, and then ran the ldif through opendj.
don't forget to backup before and after:
        mkdir ~/backups
        chmod 774 -R backups
        /opt/opendj/bin/backup -hlocalhost --port 4444 --bindDN "cn=Directory Manager" --bindPassword xxxxxxx --backUpAll --backupDirectory ~/backups/ --start 0
import users using the online interface.
Important note: For this quantity of users, we had to significantly increase an apache timeout setting. If we didn't, the inital import people would stop partway through.
login to gluu:
        sudo service gluu-server24 login
export (note: the seds format the inums so that they are one line each with no spaces in between)
        /opt/opendj/bin/ldapsearch -h localhost -p 4444 -Z -X -D "cn=directory manager" -w xxxxxxxxx -b "o=gluu" "objectclass=gluuperson" dn | sed ':a;N;$!ba;s/\n\n/\n/g' | sed ':a;N;$!ba;s/\n //g' > users.ldif
Make a python script as follows to generate your update ldif:
*filename* activateUsers.py:
        f = open('users.ldif')
        while True:
                dn=f.readline()
                if dn.strip()== "":
                        break
                print dn.strip()
                print "changetype: modify"
                print "add: gluuStatus"
                print "gluuStatus: active"
                print
Run the script and pipe output to your update file:
        python activateUsers.py > activate.ldif
Modify the users:
        /opt/opendj/bin/ldapmodify -h localhost -p 4444 -Z -X -D "cn=directory manager" -w xxxxxxxxx -c -f activate.ldif