By default External Relationships are disabled for the SCOM MP. This is a precaution put in place to keep from overloading a vROps system when a large SCOM environment is present. To enable External Relationships follow the steps below:
1. SSH into all nodes of the vROps cluster.
2. Navigate to: $ALIVE_BASE/user/plugins/inbound/msscom_adapter3/conf
3. Edit the "scom.properties" file.
4. Near the bottom of the page you will want to change the following setting from false to true:
5. Save and quit the file.
Once the next collection after the file has been saved begins it will start to create external relationships.