The Horizon View clients have a setting which forces a user session disconnect after x minutes.
This value is set to 600 minutes by default. For clients that do not support application remoting, a maximum timeout value of 1200 minutes applies if the value of this setting is Never or greater than 1200 minutes.
This value can be adjusted via a windows registry key on the Guest VM:
HKEY_LOCAL_MACHINE\SOFTWARE\VMware, Inc.\VMware VDM\Agent\Configuration\XMLAPI\sessionTimeout
If you are still having a problem changing this behavior, please let us know!
The Horizon Air Team.
Also note that you may need to add that property - it may not exist by default.