my system is set up with MS Lync and it working fine as soon as redirect from Lync is back to UC. this make a sustem crash, log is created and reboot. system is up but not all functions are working so serial access is require. in my case its remote system and Ive got no access to serial).
picture is like this.
number 172 calling 178. 178 has got forward to lync 8178. now the client is off or has got redirect to some external number. in such case Lync redirect this call to UC which should handle this external call. and now is final moment and system crash and device reload with reduce funcions.