Create a directory for restoring database backup files (if needed)
Use Rhinoback to restore the database files to a directory you decided
Download Exchange Recovery Utility - ExRestoreX64.zip
Dismount the database/s using Exchange Management Console -> expand [Server Configuration] -> Select [Mailbox] -> Right-click the database/s that will be recovered, and select [Dismount Database])
Run Exchange Recovery Utility [ExRestoreX64.exe] in command prompt, follow the usage instructions to recover your database/s
Mount the database/s using Exchange Management Console -> Click to expand [Server Configuration] -> Select [Mailbox] -> Right-click the database/s that you just dismounted, and select [Mount Database]