If you have Boot Camp installed on your hard drive to use Windows in addition to MacOS, you can back up and recover the entire disk, including Boot Camp.
Bootability of both operating systems will be kept.
If you use third-party drivers to write to the NTFS file system, stable operation of such drivers is not guaranteed when a backup is in progress.
If you use Parallels Desktop software to run Windows from Boot Camp, you need to shut down the corresponding Windows machine before taking the backup with Acronis. Otherwise the backup may fail or will include Boot Camp in an inconsistent, unbootable state. The reason is that Parallels Desktop does not support snapshotting of Windows running from Boot Camp: http://kb.parallels.com/en/112941
Acronis True Image PC version is not compatible with Bootcamp partition. Use Acronis True Image Mac version to backup your entire Mac including the Bootcamp partition.