We had created a WCF Service as wrapper over our OrganizationService.svc. It was all working fine until we installed UR 13. After installing UR 13, we started getting the below error for our WCF Service in the eventlog.
MSCRMAuthentication cannot be found. Either the component that raises this event is not installed on your local computer or the installation is corrupted. You can install or repair the component on the local computer.
We had to replace the following assemblies from the CRM Server’s bin (latest one after installing UR 13) directory to WCF Service bin directory.
Hope it helps.