Current number of Storage Service API calls Executing.
Heavy load may cause the thread counter to go high temporarily but improper handling of errors might cause threads to leak.
If server load is high, this condition will self-heal. But, be sure to check error
details in event log. If counter shows steady increase, especially if EWS autodiscover errors
exist in the event logs, action must be taken to avoid an out-of-resource condition. The action
called for is to kill the "LysSrv.exe" process (which will auto-restart). If the counters continue
to grow after restart, consider restarting RTCSRV service. Additionally, investigate cause of EWS
failures in the event logs.