In earlier versions of ArcGIS, you could create/set the FLEXLM_TIMEOUT to a higher value for slower connections. I'm currently trying to troubleshoot a system (one where I have minimal control) with slow connections to the license manager.
I was able to create a FLEXLM_TIMEOUT user variable and fired up ArcMap several times with no timeout error. But maybe I'm lucky and the network I'm on is having a good afternoon.
Does anyone know if this environment variable is actually used by ArcGIS(FLEXnet Publisher)?