Error 0x80EE0065

Value: -2131885979 | 0x80EE0065 | 2163081317

What does it mean ?

RTC_E_SIP_INVALID_CERTIFICATE  
Invalid certificate
Value: 101 | 0x0065 | 0b0000000001100101

Where does it come from ?

FACILITY_RTC_INTERFACE  
RTC - Real-time Communications
Value: 238 | 0x0EE | 0b11101110

Other Errors for FACILITY_RTC_INTERFACE