yesterday my Domain controller that hold FSMO was shutdown unexpected. After start again some domains controllers started appear event id 4 and when i ran dcdiag and repadmin i get "the target principal name incorret". I tried execute de following steps:
1. Stop kdc in the domain controller affected (i.e DC2) and flag the service with manual status
2. Restart DC2
3. On DC1 (that hold FSMO) i ran the command:
netdom resetpwd /server:DC2 /UserD:domain\administrator /PasswordD:**
4. After command execute with success i restarted the DC2
5. When DC2 started i start kdc service.
But the problem still in many domain controller from in my envioriment. I forgot execute anything???