You need to set pass4SymmKey in the forwarder's [indexer_discovery] to match either [general] or [indexer_discovery]'s pass4SymmKey of CM. On the other hand, your curl request is not valid. It should look something similar to this (It's a post and needs authentication): curl -k -u admin:changeme -d "site=default" -d "guid=xxxx" https://localhost:8090/services/indexer_discovery ... View more