Hello,
Are you backing up remote server?
Are you taking a backup of databases like exchange or sql?
It has been observed that the "BEserver.exe" utilizes high CPU percentage when the backup job is configured to use notification. We suggest you try out following options, which will help us to figure out the exact cause:
1. Go to Tools => Options => Job Logs
2. Select the option "summary information only" in the Information to include in log
3. Click ok
4. Run a backup job and observe the results.
NOTE : If we do not receive your reply within two business days, this post would be marked assumed answered and would be moved to answered questions pool.