Clients and applications that you wish to protect with Windows instant recovery should be backed up periodically. It is not necessary to create a special schedule for clients protected with WIR. If you are implementing WIR for a client that is already protected in a backup schedule, the existing schedule will work fine. It is recommended that you use an incremental forever schedule, but any schedule that consists of periodic full and differential backups or periodic full and incremental backups will work. For more details, see Backups Overview and File-level backup strategies.
For a SQL server protected with WIR, the recommended strategy is a combination of SQL Full and Transaction Log backups (see Microsoft SQL Protection).
Once you have created a VFC, completed backups are restored to the VFC to ensure that it stays current. For details, see Virtual restores for Windows instant recovery.