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Title
How to configure FNMS to support load balancing multiple web application servers

Summary

How to configure FNMS to support load balancing multiple web application servers

Synopsis

In order to support multiple web application servers via a load balancer, the web application's machine key must be identical between all web application servers.

Discussion

In each FNMS web application server, browse to the <INSTALLDIR>\FlexNet Manager Platform\WebUI\Web.config file and inside the xml file there will be a machineKey element like

<machineKey validiationKey=DF23423DABE3810..... />

You must copy this element to all other web application server's web.config to ensure that cookies and session state can be encrypted/decrypted between all application servers.

Also, it is recommended to do the same for <INSTALLDIR>\FlexNet Manager Platform\SAP\Portal\web.config so users can use the SAP portal via a load balancer as well.

Additional Information

At the time of writing this KB article is valid for FNMS 2015, 2015 R2 and 2015 R2 SP1.
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How to configure FNMS to support load balancing multiple web application servers