In the AdminTool, click on the Server tile and click on “Group Policies (GPO)”

You can set up a timeout for disconnected sessions which will cause a disconnected user session to automatically logoff after a while.

If you want your disconnected sessions to terminate quickly, type in 0.5 for 30 sec. Enter 0 if you want your remote sessions to never end.

If your server is the member of a domain, this strategy may need to be set directly on the domain controller.

– open your domain strategy object editor (gpmc.msc) and locate the following strategy :

  Computer configuration / Administrative Template / Windows components / Remote Desktop Services / Remote Desktop Session Host / Session time limit /

 You can also make sure your domain controller do not prevent local strategies to be executed. 

– this strategy needs to be disabled and is located in :

  Computer configuration / Policies / Administrative Template / System / Group Policy / Turn off Local Group Policy objects processing.

Either solution should work, choose the one that fits your preference.

 If you are experiencing this issue with the HTML5 web client:
– edit the settings.js file with notepad located in C:\Program Files (x86)\RDPlus\Clients\www\software\html5

– and modify the W.send_logoff = true parameter to false.

Please note that if your RDPlus server has joined a Domain, then RDPlus disconnected sessions rules don’t apply.