Issue in making Remote powershell connection from windows 7 - powershell-remoting

Question

I am trying to make persistant remote powershell connection from Windows7(32-bit) to exchange Server 2013,such that I can run some powershell commands from My windows7
machine as i am running it on server.
I am following steps from this article https://technet.microsoft.com/en-us/library/dd335083(v=exchg.150).aspx
I had already installed
.net Framework Version 4.5,
Windows Framework 4.0,
and windows already has SP1 installed.
Now, the issue is in running this command
$Session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri http://ServerName.domain.com/PowerShell/ -Authentication Kerberos -Credential $UserCredential
Everytime it results into an error that is
New-PSSession : [ex13r.corp.local] Connecting to remote server ex13r.corp.local failed with the following error
message : WinRM cannot process the request. The following error with errorcode 0x80090311 occurred while using
Kerberos authentication: There are currently no logon servers available to service the logon request.
Possible causes are:
-The user name or password specified are invalid.
-Kerberos is used when no authentication method and no user name are specified.
-Kerberos accepts domain user names, but not local user names.
-The Service Principal Name (SPN) for the remote computer name and port does not exist.
-The client and remote computers are in different domains and there is no trust between the two domains.
After checking for the above issues, try the following:
-Check the Event Viewer for events related to authentication.
-Change the authentication method; add the destination computer to the WinRM TrustedHosts configuration setting or
use HTTPS transport.
Note that computers in the TrustedHosts list might not be authenticated.
-For more information about WinRM configuration, run the following command: winrm help config. For more
information, see the about_Remote_Troubleshooting Help topic.
At D:\path.ps1:1 char:10
+ $session=New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri http ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : OpenError: (System.Manageme....RemoteRunspace:RemoteRunspace) [New-PSSession], PSRemotin
gTransportException
+ FullyQualifiedErrorId : AuthenticationFailed,PSSessionOpenFailed
NOTE
Client machine(Windows7) is not connected to any domain
I added the server to the list of trustedHosts
Set-ExecutionPolicy to remotesigned
Winrm service is also running.
Windows firewall is turned off on both the systems.
My Powershell Configuration after framework 4.0 installation is as follows
Name Value
---- -----
PSVersion 4.0
WSManStackVersion 3.0
SerializationVersion 1.1.0.1
CLRVersion 4.0.30319.18408
BuildVersion 6.3.9600.16406
PSCompatibleVersions {1.0, 2.0, 3.0, 4.0}
PSRemotingProtocolVersion 2.2
My efforts are going in no direction,the error remains the same.Any help would greatly be appreciated.
Thanks!