In my environment, we have RDS setup for both Session Hosts and Virtualization Hosts (Server 2012 r2). We host a good handful of applications for our end users to access from both in the office and externally at home, via VPN or just connecting via the RD Gateway.
In the past week or two, some users are complaining that while working remotely at home, their RemoteApp application will randomly bring its focus to the front of the screen and they just have to click back on whatever they were working on (non-remoteapp
program). This does not seem to happen on computers in the office, on the network, only externally. I am able to replicate the problem on my personal computer at home, my work system at home as well as work laptops on our external network, it happens
about once every 10-15 minutes. When I open server manager, it shows a Disconnect Time that matches up with when the application brings its focus to the front of the screen, so it appears to be disconnecting and reconnecting within a split second.
I read some other threads about removing KB2923545, but this did not fix the issue.
My next step was to check the event logs on the session host servers and it seems as right before it disconnects, there is an Error log under Remote Desktop Services1 with an Event ID of 1152 stating "Failed to create KVP sessions string. Error Code 0x8007007A". Upon looking this error message up both here on technet and around the internet, most responses were that it's related to Licensing. Our RDS is setup as a "Per User" based license, which was setup by the staff prior to me who are no longer with the organization. I checked our licensing server and it shows "Windows Server 2012 - Installed RDS Per User CAL - Volume License" of 5000 Total, and 4484 Available and 516 being used. We also have "Windows Server 2012 - Installed RDS Per Device CAL" of over 8000 with 10 being used.
Is there anything else I should be checking...I appear to be at a loss to figuring out why this is happening. To me, it's not huge, but to the end user, it's an inconvenience to them.