Event ID - 8200

Event Id8200
SourceMicrosoft-Windows-IDMU-Psync
Description%1: unknown host. Make sure that host name is valid and it resolves to a valid IP address.
Event Information According to Microsoft :

Cause :

This event is logged when unknown host.

Resolution :

Check that the UNIX host is valid

The UNIX host specified in the error message is an unknown host. Verify that the host name is valid and that it resolves to a valid IP address. Check the configuration setting on the UNIX host computer and run the ping command on the host to verify that a valid IP is granted. If you cannot obtain a valid IP, contact the administrator for the UNIX-based network.

Verify :

Retry Windows to UNIX password synchronization for any failed user password change attempts to verify that Password Synchronization is operating normally. Password Synchronization is operating normally when password synchronization succeeds and is operating under warning conditions if synchronization fails for some passwords but succeeds for others.

If password synchronization succeeds for some passwords but fails for others, Windows to UNIX Password Synchronization Configuration is likely fully operational, but there might be account- or computer-specific configuration problems preventing password changes from being synchronized on UNIX-based hosts.
Reference LinksEvent ID 8200 from Microsoft-Windows-IDMU-Psync

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