The issues involved in backing up a GroupWise®system in a Microsoft cluster are the same as in backing up any GroupWise system that is running on Windows. If you want to back up your GroupWise system while it is running, you must use backup software that can back up open files. If your backup software cannot back up open files, then you must stop all GroupWise agents before running the backup and start them again when the backup is finished. This means that GroupWise users cannot be logged into their mailboxes while backups are running.