When starting the Coexistence Manager for Notes Mail Connector Service, it begins to start and then fails.
The Cause was determined to be a missing CMN.ntf file. The Mail Connector CMN.log file will show the following error:
ERROR CMN.logging  - Active Mail processing error: The required input template file 'C:\Program Files (x86)\Quest Software\Quest Coexistence Manager For Notes\Mail Connector\CMN.ntf' is missing.
This issue can be resolved by copying over the missing file into the expected location listed above.
It can be done by a Repair Install or running a Fresh install on another machine and copying the file over to the expected location listed above