kerberos authentication error on Exchange Server 2010 Management Consol

Solutions:
Essayer une des solutions suivantes

==> Redémarrer les services IIS:
open CMD as an Administrator " iisreset /restart :D "
Open an elevated prompt (as administrator) and execute IISRESET

==> If you are unable to open EMC and EMS, open command prompt and run the following cmdlets. First cmd to check if there is any proxy and if there is run the second cmd.
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netsh winhttp show proxy
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Now run
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netsh winhttp reset proxy
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This should be able to access EMS and EMC.

==> Open a command prompt on the server and type
" WinRM QuickConfig "
Answer "y" or yes to all prompts.
Keep runnign the above command until it returns a positive result.
(WinRM already set up to receive)
After that returns a similiar message as above, open up the services (start, run, services.msc) and locate the following three services,
IIS Admin Service
Windows Remote Management (WS-Management)
World Wide Web Publishing Service.
Make sure all three are running and set to start automatically, if not, start them and set them.
Now, navigate to start, all programs, administrative tools, IIS Manager. Click on the "Default Site" and on the far right make sure the site is started. If it shows a little play button with "Start" next to it, click it, it means it's not started.
If it fails to start, let me know, we have more to do then.

==> Voir le temps sur le serveur Exchange
il doit synchroniser avec le temps de l'AD

==> restart the " World Wide Web Publishing Service "

==> dans les registres
Method 1:
Close all MMC/EMC instances before proceeding.
Open Registry Editor (regedit) as the user you run the EMC under.
Go to HKEY_CURRENT_USER\SOFTWARE\Microsoft\ExchangeServer\v14\AdminTools
Look for value NodeStructureSetting.
If it is there, back it up and then remove it.

Method 2:
Close all MMC/EMC Instances before proceeding.
Open Powershell or Powershell IDE as the user you run the EMC under and execute the following command:.
Remove-ItemProperty -Path HKCU:\Software\Microsoft\ExchangeServer\v14\AdminTools\ -Name NodeStructureSettings
Close Powershell
After performing either of the methods above to remove the registry entry you should be able to open the Exchange Management Console and it will discover another Exchange server and connect.