There are two UMPs configured - one for internal use and one for external. The cabi_external probe is deployed in this environment. The cabi dashboards are visible from the internal UMP, but not from the external UMP.
Environment
UIM 8.51 cabi_external 3.20 ump_cabi: 3.20
Cause
UMP configured to use SSL but the external CABI server was not.
Resolution
Enabled SSL on the external CABI server. Change the cabi_url in the setup section of the cabi_external.cfg to use the secure HTTPS URL.