Documentum - ERMS - CRM Integration

Hello experts.

I have this need to fulfill and unfortunately i don't really have experience with these modules. I hope i can structure the question good enough to let you understand and help me.

I have a document scanned uploaded to Documentum, if i'm not wrong this document is linked with a BP in ERMS (correct me if i'm wrong). Basically i need to get this document unlinked and link it to another BP.

Tell me if you need for information.

Thank you very much if you can help me.

Fabio