You need to take into account peak business loads when scheduling backups for your system as this can reduce system load during peak hours. For example, backups are probably best scheduled for early morning hours such as 2:00 AM.
Incremental backups (see Incremental Backup) will scan the store for changed data and back up only what has changed. Full backups will back up the entire message store. You need to determine how often the system should perform full as opposed to incremental backups. You’ll probably want to perform incremental backups as a daily maintenance procedure and full backups once a week.
When user data is stored on multiple disks, you can back up user groups in parallel if you wish. Depending on system resources, parallel backups can speed up the overall backup procedure. However, you might want to use serial backups if you want to reduce backup impact on the server’s performance. Whether to use parallel or serial backups can depend on many factors, including system load, hardware configuration, how many tape drives are available, and so on.