Error when loading MS Exchange Systems Manager

I'm getting the error below when trying to expand the tree for MS Exchange Systems Manager v. 2010.  

The following error occurred while searching for the on-premises exchange server:

You cannot call a method on a null-valued expression.  It was running the command 'Discover-ExchangeServer -useWIA $true -SuppressError $true -CurrentVersion 'Version 14.1 (Build 218.15)".

Anybody know what this is and how to resolve it?
ben9035Asked:
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e_aravindConnect With a Mentor Commented:
Check for the event IDs like
Source: Microsoft-Windows-WinRM
EventID: 10113
Level: Warning
Description: Request processing failed because the WinRM service cannot load data or event source: DLL="%ExchangeInstallPath%Bin\Microsoft.Exchange.AuthorizationPlugin.dll

Resolving WinRM errors and Exchange 2010 Management tools startup failures
http://blogs.technet.com/b/exchange/archive/2010/12/07/3411644.aspx

Troubleshooting Exchange 2010 Management Tools startup issues
http://blogs.technet.com/b/exchange/archive/2010/02/04/3409289.aspx
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