It is possible that: 1. The destination computer is unreachable (because it is down, or due to a firewall issue). 2. The ...

   It is possible that:
   1. The destination computer is unreachable (because it is down, or due to a firewall issue).
   2. The destination certificate is signed by another certificate authority not trusted by the management server.
   3. The destination has an invalid certificate, e.g., its common name (CN) does not match the fully qualified domain name (FQDN) used for the connection.
   4. The servers in the resource pool have not been configured to trust certificates signed by other servers in the pool.