Diagnosis:

The error "enterprise ID does not match the server instance!" will be reported in the case if user will try to load license in to its TS from unrelated accounts. For example, if  LLS TS already have license from account A , but then if we try to load license from Account B, you will see such error.

Sample LLS Logs:

09:30:30,806 ERROR Scheduled-pool-3-thread-5 Capability response rejected: the response enterprise ID does not match the server instance
09:30:31,421 INFO srvpool-25 [request] GET:/api/1.0/health
09:30:34,630 INFO srvpool-46 [request] GET:/api/1.0/instances/TESTCLS123/features?size=100
09:30:37,950 INFO srvpool-29 [request] GET:/api/1.0/instances/TESTCLS123/capability_request?force
09:30:39,149 WARN srvpool-29 REST API bad request: Capability response rejected: the response enterprise ID does not match the server instance
09:30:39,159 WARN srvpool-29 Resolved [com.flexnet.glservice.exceptions.LicensingFault: Capability response rejected: the response enterprise ID does not match the server instance]
09:31:04,535 ERROR Scheduled-pool-3-thread-8 Capability response rejected: the response enterprise ID does not match the server instance
09:33:49,199 INFO srvpool-27 [request] GET:/api/1.0/instances/TESTCLS123/capability_request?force=true
09:33:51,551 WARN srvpool-27 REST API bad request: Capability response rejected: the response enterprise ID does not match the server instance
09:33:51,552 WARN srvpool-27 Resolved [com.flexnet.glservice.exceptions.LicensingFault: Capability response rejected: the response enterprise ID does not match the server instance]