You may run an XPS tool such as XPSSweeper, XPSExport, XPSImport, XPSExplorer and see errors similar to the following
[Validate.cpp:1055][IXPSObjectV1::CheckForDanglingObjects][WARN][sm-xpsxps-03491] CA.SM::[email protected]AuqeHtjiIq2qvt7mNN7MMXhtgoi8MjSwSPgfr8=: AgentInstance has an attribute named 'ACOLink' that points to an object of type 'AgentConfig' that does not exist. (The unique ID of the AgentConfig object being pointed to is #1150481580)
[Validate.cpp:1055][IXPSObjectV1::CheckForDanglingObjects][WARN][sm-xpsxps-03491] CA.SM::[email protected]bLSssWbzLLEXC+EW45KWqwHsez07WeM7Psy7f5HWU=: AgentInstance has an attribute named 'TrustedHostLink' that points to an object of type 'TrustedHost' that does not exist. (The unique ID of the TrustedHost object being pointed to is #1123624380)
Siteminder Policy Server
Release : 12.8.x
When Agent Discovery is enabled on the policy server, when a web agent connects to the policy server for the first time, an AgentInstance object is created. At some point later, an object such as an Agent Configuratoin Object (ACO) or a TrustedHost object is deleted from the policy store. The errors (above) are indicating that the AgentInstance object has the 'TrustedHost' attribute pointing to the XID of an Trusted Host object that no longer exists in the policy store. In the other example (above) the AgentInstance object is pointing to an ACO which no longer exists.
The Agent Instance objects in the error need to be deleted from the Policy Store. This can either be done through the AdminUI or through XPSExplorer. At the minimum, the Agent Instance objects which are returning errors during XPS Validation need to be removed. You can simply remove ALL Agent Instance objects. The next time an agent connects to the policy server, a new Agent Instance object is created.
If there is no valid Agent Instance object in the policy store when the agent connects, the policy server will simply create a new one. Deleting agent instances have no direct bearing on active agents. Deleting the agent instance does not delete the agent, agent object or any functionality or transactional flow. Deleting AgentInstance objects is complete safe in a running environment.