Endpoint Agent shows as "Online (Paired with another CCN)"

The message "Paired with another CCN" means that the endpoint(s) in question have been paired with another instance of the CCleaner Network service. There are 2 ways that this can present itself:

Only affecting a few endpoints:

Please can you submit your ACModel file from the server. 

The default location for this is:

C:\Program Files (x86)\CCleaner Network\Management Server

  

The issue is with large number/all of your endpoints:

Please can you submit:

  1. Your ACModel file. The default location for this is - C:\Program Files (x86)\CCleaner Network\Management Server
  2. Your unique pair key from the registry on an affected endpoint.

Found at:

HKLM > Software > Wow6432Node > Piriform > CCN > UC. Value = AcPaired.