Error Message

2018/11/21 20:36:03 VCS ERROR V-16-20081-52 () RemoteCopy:RemoteCopy:online:Remote Copy command :: [showrcopy group ] Failed with output [The authenticity of the storage system cannot be established.
CLI Server Certificate
  Issuer:           CN=HP 3PAR HP_3PAR 7400 ####
  Subject:          CN=HP 3PAR HP_3PAR 7400 ####
  SHA1 fingerprint: #################################
  Validity:         Not before: Dec   3 06:34:49 2014 GMT
                    Not after:  Nov  30 06:34:49 2024 GMT
  Error: self signed certificate
  Error: subject CN ("HP 3PAR HP_3PAR 7400 ####") does not match the system name ("HostName")
  Continue connecting (yes/no)?
  ].

The certificate has not been added to the excp file, and as such VCS cannot continue connecting.

The output above shows that the certificate had not been added to exception.

To add it to exception you would have to connect to the cli through command line, and say yes to adding it permanently:

cli -sys -pwf

After that when you re-connect through CLI the error doesn't come up anymore because it creates excp file in the user directory:
%USERPROFILE%\.hp3par\excp

VCS continued to have the same issue even after the exception was created.
The issue continued occuring because the .hp3par folder needs to be copied to the system profile in the following directory:

C:\Windows\SysWOW64\config\systemprofile

After the copying is completed, you may proceed with onlining the RemoteCopy resource.

For command references for 3par CLI you may use the following guide:

3PAR CLI guide

For RemoteCopy VCS agent configuration guide use the following:

https://docs.infoscale.com/

RemoteCopy not coming online because of Certificate issues