The Windows Services console shows two identical services for VIP LdapSync. Both show as 'starting' but the service never starts. The service appears to be in a hung state.
(Minimum hardware requirements for VIP Enterprise Gateway 9.9.x is 8Gb RAM and 40Gb disk space. 16Gb or more RAM recommend when LDAP synchronization is enabled.)
Important: Always stop and start VIP Enterprise Gateway LDAP services from the VIP console. Forcing LDAP services to start from Windows Services will bypass pre-start checks put in place to ensure the service starts in a stable state.