In remoting when a user logged into a computer uses a command to execute a script block or another command on the remote machine that needs to access another machine remotely (a very common scenario is a SharePoint farm) where Kerberos is not enabled, you may encounter a problem called 'Double hop'. Double hop refers to the problem where the first server accessed via remoting tries to access the second server by default using the credentials the PowerShell process is running under. The problem arises because the credentials that the remote server uses to access the second server may not have the required permissions to perform the action.
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