FAQ: How should the ArcIMSSite.sez file be managed?
How should the ArcIMSSite.sez file be managed?
The ArcIMSSite.sez file can become corrupt and a weekly backup of this file is encouraged. If problems occur, the site can be restored by utilizing the backup file.
Also, a record of the service names and screenshots of each map service's properties is encouraged, so that this information can be retrieved if it becomes necessary to restore the site.
The ArcIMS command line can be used to restore services: Manage ArcIMS from the command line