The Oxford SBS Guy explains that he encountered a problem and received an error message while attempting to open Microsoft Exchange 2010 Management Console. He determined that one way to correct this problem is to open a command prompt and perform an iisreset.
Here is then entire error message that Oxford SBS Guy received while trying to open the Exchange 2010 Management Console:
“The attempt to connect to http://server/Powershell user ‘Kerberos’ authentication failed: Connecting to remote server failed with the following error message: The WS-Management service cannot process the request. The system load quota of 1000 requests per 2 seconds has been exceeded. Send future requests at a slower rate or raise the quota for this user. The next request from this user will not be approved for at least xx milliseconds.”
Here is the link to the full article written by Oxford SBS Guy.