Error in Exchange server commands

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C#

PowerShell

server

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Hello,

I am working with power shell and Exchange server 2010. I was able to get mailbox details using the following command

$server='WIN-APRJ2923AV5.abc.com';$pwd= convertto-securestring 'Global123$' -asplaintext -force;$cred=new-object -typename System.Management.Automation.PSCredential -argumentlist 'Administrator',$pwd; invoke-command -computername $server -credential $cred -scriptblock {Add-PSSnapin Microsoft.Exchange.Management.PowerShell.E2010; get-mailbox xyz}

I have tried this command with IP address instead of Computername....

$server='192.168.1.194';$pwd= convertto-securestring 'Global123$'-asplaintext -force;$cred=new-object -typename System.Management.Automation.PSCredential -argumentlist 'WIN-APRJ2923AV5.abc.com\Administrator',$pwd; invoke-command -computername $server -credential $cred -scriptblock {Add-PSSnapin Microsoft.Exchange.Management.PowerShell.E2010; get-mailbox xyz}

But it threw an exception as follows

[192.168.1.194] Connecting to remote server failed with the following error message : The WinRM client cannot process the request. Default authentication may be used with an IP address under the following conditions: the transport is HTTPS or the destination is in the TrustedHosts list, and explicit credentials are provided. Use winrm.cmd to configure TrustedHosts. Note that computers in the TrustedHosts list might not be authenticated. For more information on how to set TrustedHosts run the following command: winrm help config. For more information, see the about_Remote_Troubleshooting Help topic.
    + CategoryInfo          : OpenError: (:) [], PSRemotingTransportException
    + FullyQualifiedErrorId : PSSessionStateBroken

What is the problem with second query? Can anyone help me on this?

Thanks & Regards
Sebastian