I have found a problem working with XPM in a load balance environment with two servers. The Update Preview Button is always showing me the alert to update the preview of the Page.
In the SDL documentation I found something related with the machine name in the
cd_storage_config, so I put a descriptive machine name on the servers, different between them but I have the same problem.
What is the correct configuration for this type of environment? Is there any other configuration missed?