Exchange Server managment shell not responding.

Hello. 

I want to uninstall an exchange server, but because there are mailboxes I can't. I also can't delete the mailboxes because I cannot gain access either to the ecp or managment shell. 

ecp returns a 404 error and the managment shell gives this error: 

VERBOSE: Connecting toexchange.domain.local.
New-PSSession : [exchange.domain.local] The WinRM service cannot process the request because the request needs to be sent
to a different machine. Use the redirect information to send the request to a new machine.  Redirect location reported:
 https://exchange.domain.local/owa . To automatically connect to the redirected URI, verify "MaximumConnectionRedirectionCount" property of session preference variable "PSSessionOption" and use "AllowRedirection" parameter on the cmdlet.
At line:1 char:1
+ New-PSSession -ConnectionURI "$connectionUri" -ConfigurationName Microsoft.Excha ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : OpenError: (System.Manageme....RemoteRunspace:RemoteRunspace) [New-PSSession], PSRemotin
   gTransportRedirectException
    + FullyQualifiedErrorId : RedirectInformationRequired,PSSessionOpenFailed.

Any help would be greatly appreciated.