URL : http:////docs.vmware.com/en/Site-Recovery-Manager/8.1/com.vmware.srm.install_config.doc/GUID-C1E9E7D...
Topic Name : Overview of VMware Site Recovery Manager
Publication Name : Site Recovery Manager Installation and Configuration
Product/Version : Site Recovery Manager/8.1
Is it possible to have 2 SRM Instances registered with 1 VCenter Server? If so, what is the process? I'd like to install SRM on a separate system and point it to a Vcenter that already has a SRM instance registered.
I suppose you are having a multi site set up due to which you are expecting 2 SRM instance being registered to one vCenter.
Yes it is possible if you provide custom identifier during second installation.Please keep in mind the identifer/plugin id name should match to the other site which you are trying to pair it with.
Check if the following VMware article helps:
Site Recovery Manager in a Two-Site Topology with Multiple vCenter Server Instances per Platform Ser...