System.UnauthorizedAccessException: 'Retrieving the COM class factory for component with CLSID failed due to the following error: 80070005 Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED)).'
The code is calling a web method that that calls a custom dcom application. The web service has been set to run on 32 bit on IIS.
DCom CLSID does exist and I have checked permission.
Uninstalled and re-installing the custom Dcom application resolved my issue.