The Enterprise Server shows that licenses are not available on the license server which is installed on the local host machine.
The Flexnet server webpage shows that licenses are available but have not been used by the Enterprise Server.
EcoStruxure Building Operation
Building Operation Enterprise Server
In some cases, the Enterprise Server may have trouble resolving the @LocalHost address.
It is not known why this affects only some licenses.
On the License Server Address page of the License Administrator enter the IP address or computer name of the local host machine instead of @localhost.