Hello, we got an exchange cluster (4 nodes). We have a regular warning in the event log : The program svchost.exe, with the assigned process ID 1388, could not authenticate locally by using the target name HOST/UEFA06-EXC0218.uefa.local\. The target name used is not valid. A target name should refer to one of the local computer names, for example, the DNS host name. Try a different target name. What bugs me is that we got a "\" after the SPN "HOST/UEFA06-EXC0218.uefa.local" I am wondering how to find where that "\" come from another question is : should i remove the "\" or had a new SPN with the "\"

What version of Exchange?Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."

Exchange 2010

I say another post, try this: http://social.technet.microsoft.com/Forums/en/winserverManagement/thread/7829f169-8932-42a2-b035-af35f27deca2 John