I connected into a clients server today to do some maintenance for them. When I opened up PowerShell, it gave me a stack of errors indicating failure to connect to the remote server. The key issue it described was below
The WS-Management service cannot process the request. The load quota for the system has been exceeded. Send future requests at a slower rate or raise the system quota.
The server had not been rebooted in some time, so I figured something screwy with IIS. I used the Internet Information Services Manager MMC and recycled the MSExchangePowerShellAppPool as below