1. Create a dataset in CMDB, which will act as a temporary dataset for storing CIs discovered from ADDM
2. Configure CMDB details in Administration of ADDM like [ Remedy server , above created dataset]
3. Add Runs for running discovery (please make sure those IP / IP Range is cummunicating with ADDM .. For that use Test IP from ADDM)
4. Use Reconcilication activies in CMDB agains above configured dataset like Identification / Merge, to put discovered CI's into production dataset.
5. Make sure CMDB Sync and Discovery is running.
Please let me know in case of any query.
Some more helpful links
Thanks - Sushil