The following error occurred while attempting to connect to the specified Exchange server ‘yourserver.domain.com’:The attempt to connect to http://yourserver.domain.com/PowerShell using “Kerberos” authentication failed: Connecting to remote server failed with the following error message : WinRM cannot process the request. The following error occured while using Kerberos authentication: The network path was not found. Possible causes are: -The user name or password specified are invalid. -Kerberos is used when no authentication method and no user name are specified. -Kerberos accepts domain user names, but not local user names. -The Service Principal Name (SPN) for the remote computer name and port does not exist. -The client and remote computers are in different domains and there is no trust between the two domains. After checking for the above issues, try the following: -Check the Event Viewer for events related to authentication. -Change the authentication method; add the destination computer to the WinRM TrustedHosts configuration setting or use HTTPS transport. Note that computers in the TrustedHosts list might not be authenticated. -For more information about WinRM configuration, run the following command: winrm help config. For more information, see the about_Remote_Troubleshooting Help topic.
The solution is to first export and then delete
HKCUSoftwareMicrosoftExchangeServerv14AdminToolsNodeStructureSettings (REG_BINARY key) registry key.