Recently came across this in my lab where i had 2 sites set up (azure) in opposing continents – one in Europe and in the Americas. The license server i had located in the Americas data center. The delivery controller located in the European data center would from time to time have issues connecting to the license server.
To fix this the FLEXLM_TIMEOUT value must be pushed out to accomodate the latency. To do
i) On the DC,right click start and select Computer > Properties > Advanced system settings > Environment Variables
ii) Configure variable FLEXLM_TIMEOUT to the value 900000
iii) Must reboot the DC to complete the fix