Avoid Exception Error "Remote Agent not detected" when using NAS as clients

Hi, 

Server: Backup Exec 2012

Client: NAS Box

Issue: Successful completion with Exceptions "Remote Agent Not Detected"

In our environment, we are taking backups successfully from NAS boxes. But after the sucessfull completion of the Backup job, there are errors thrown with Exceptions as "Remote Agent not detected". 

Knowing that the NAS boxes added as a client of File Server Type, which does not have remote agent, why is it checking for a remote Agent, and how to avoid this Exception.