All steps below assume that you followed the installation instructions as described in our license server installation instructions, and that all FlexSim's license server files were extracted to the location C:\FlexSim_LMTOOLS. Throughout these instructions we will reference files inside that folder.
Find your fulfillment ID
On your license server, run the flexsimserveractutil.exe program (C:\FlexSim_LMTOOLS\flexsimserveractutil\flexsimserveractutil.exe) by right-clicking and selecting Run as Administrator.
In the FlexSim ServerActUtil program, go to Tools > View License Rights.
Copy the Fulfillment ID for the Activation ID you are upgrading by highlighting the Fulfillment ID and pressing Ctrl+C.
Attempt online return
When your license server returns a license over the the Internet, flexsimserveractutil.exe will communicate with the following FlexSim servers via HTTP (port 80) and HTTPS (port 443):
In the FlexSim ServerActUtil program, select Connect > Return.
Paste the Fulfillment ID into the field using Ctrl+V, and press the Return button.
After a few seconds and several status messages, you should receive an indication of success.