There is no limit how many objects you can handle within management API. If your team observed that only first 30 entries are processed, then there is some logical problem in their script. Are you able to provide the script so we can have a look and check the problem ?
I personally wrote script using bash and mgmt_cli which created more than 1000 objects on different Domains on MDS.
Some steps which should be done via script:
1. Check if script is run on management
2. if MDS, check if Domain in question exists
3. login to Domain and get session id
4. Gather all already created objects from Domain
5. If object doesnt exist, create and add to needed group
6. publish changes made within session
7. install needed policy (check on which policy package the affected group is used)
8. logout from current domain
9. repeat steps 2-8 for all affected Domains
Kind regards,
Jozko Mrkvicka