Thank you for your reply. I changed it, and now our companyweb is working again, but not our exchange web acces (owa).
It gives me this error :
Outlook Web Access did not initialize. An event has been logged so that the system administrator can resolve the issue. Please contact technical support for your organization.
Web object 'IIS://PCBSERVER.pcbackup.local/W3SVC/3/ROOT' cannot be found.
Any ideas?