Unable to load the ArcGIS Server backing stores and/or the ArcGIS Server license information

Error Message

In ArcGIS Enterprise, licensing roles for federated servers can be configured from the Organization tab. However, attempting to configure the server roles fail, returning the following error message:

Error:   
Unable to load the ArcGIS Server backing stores and/or the ArcGIS Server license information.

Cause

The server's root certificate is untrusted and may be configured without a subject alternative name (SAN) parameter. This can be indicated in the portal logs as an error about the certificate missing the SAN parameter. An untrusted certificate includes self-signed certificates and certificates issued by an unrecognized certificate authority (CA).

As of ArcGIS Enterprise 12.0, the portal's proxy capability is restricted by default. This may impact your ability to configure the server roles until the appropriate hostname is added to the list of allowed proxy hosts, See: Restrict the portal's proxy capability

Solution or Workaround

Replace the self-signed certificate with a CA-signed certificate.

To generate a new CA-signed certificate and configure ArcGIS Server with the certificate, refer to ArcGIS Server: Configure ArcGIS Server with a new CA-signed certificate.

To configure ArcGIS Server with an existing CA-signed certificate, refer to ArcGIS Server: Configure ArcGIS Server with an existing CA-signed certificate.

Configure a list of host names or domains that the portal is allowed to access. See: Allowed proxy hosts