When you try to open the Exchange Management Console this error occurre:

The following error occurre while attempting to connect to the specified Exchange server sbs2011.domain.local

The attempt to connect to http://sbs2011.domain.local/powershell using Kerberos authetication 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 request at a slower rate or raise the system quota. The next request from this user will not be approve for at least 1522693632 milliseconds. For more information see the about Remote_Troubleshooting

Fix:

just run iisreset from cmd