It’s a Lync 2010 Management pack bug, all what you need to do is:
- Open regedit on the Edge Server.
- Navigated to HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\eventlog
key.
- right-click on the eventlog key and selected New > Key from the pop-up menu.
- Name of the new key Office Communications Server.
- Restart the Health Service.

Please let me know if you need more information.
If the answer help you please mark the answer as proposed.