Windows default Credential error

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Windows - Exchange Error 36872 "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."

Hi

I am having an unusual problem - the error code appears every morning - error 36872. Our Exchange 2003 server stops responding and of course mail does not get delivered.

Every night the services are stopped on the servers while a backup is made with Symantec's LiveState. Then most mornings the Exchange server will not deliver email. It is intermittent but more often than not it is a problem which appears to clear if we reboot the server and login again.

We have 2000 SP4 server domain.

Can anyone shed any light on this issue? Would appreciate any comments back to help resolve this mystery.

thanks