To get to the Windows Security Screen (This shows up by pressing Ctrl + Alt + Delete) on the cloud environment please use
On Windows computers use Ctrl + Alt + End as that sends the command to the remote session, the usual key combination works on your local workstation
On MacOS use Control + Option + FN + => (right Arrow) to open the Windows Security screen
This screen allows you to Sign out (in case you are experiencing issues and require to close your session entirely to open a new one next time you launch your application) and also allows you to change your password before it expires. More info on password expiration here