Server 2003 troubleshooting

Cannot change domain password from Remote Desktop session on NON DC server :
The users password must be changed before logging on the first time
See Best Answer (KB2927811)
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Plenty of Event ID 675 with Failure Code 0x19 :

There are various causes to this error - which is a Kerberos error. One of the most common is the fact that Windows 2003 DCs inc SBS 2003 use a lower encryption standard than Vista/Win2k8/Win7. This generate a 0x19 error & possibly others. 0x18 errors seem to be to do with password failures

source

Event ID 11 "There are multiple accounts with name MSSQLSvc/..."