No suitable default server credential exists on this system. This will
prevent server applications that expect to make use of the system default
credentials from accepting SSL connections. An example of such an application
is the directory server. Applications that manage their own credentials, such
as the internet information server, are not affected by this.
Windows 2003 Enterprise Server was rebooted, latest windows update installed, no SSL certificate installed. This a domain controller with active directory,
DDNS, DHCP, Backup Exec. These events just started appearing about 5 weeks
ago for no apparent reasons.