If you get an error like the following when trying to access RemoteApp (Microsoft Remote Desktop) via the Webclient:
"Your session ended because an unexpected server authentication certificate was received from the remote PC"
You can fix this by forcefully clearing your browser's cache. Unfortunately this is a little bit involved, see below instructions:
1. Open browser's DEVTOOLS. CTRL+SHIFT+I for Windows (or OPTION+COMMAND+I on Mac).
2. Click the Network tab.
3. Tick Disable Cache.
4. Reload the webclient page, i.e. either navigate to it, or if it's already open press F5 or click the little reload button in the top left.
5. Try and run the RemoteApp.
6. Close DEVTOOLS (X in the top right corner of the inner dark gray panel).
