I had to do some tricky stuff to replace my intranet server. Likely there is a better way to do it, but what I did was:
Turn off old intranet server.
Put an alias DNS entry in my windows DNS that points the "intra" name to the new server intra1's IP.
What to do? Now i get the following error:
Event Type: Error
Event Source: Kerberos
Event Category: None
Event ID: 4
Time: 10:29:16 AM
The kerberos client received a KRB_AP_ERR_MODIFIED error from the server host/intra1.xxxx.com. The target name used was cifs/INTRA.xxxx.com. This indicates that the password used to encrypt the kerberos service ticket is different than that on the target server. Commonly, this is due to identically named machine accounts in the target realm (xxxx.COM), and the client realm. Please contact your system administrator.
For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp