Unable to load settings from configuration file. Exception: %1 Cause: The Exchange Unified Messaging Routing application ...

Unable to load settings from configuration file.

Exception: %1
Cause: The Exchange Unified Messaging Routing application is incorrectly configured or application does not have permissions to read the configuration file.
Resolution:
Verify that the RTCSRV service account has read permissions on the ExumRouting.exe.config file located in the installation directory.