Starting with Update 1, Acronis Backup 12.5 (both Standard and Advanced) provides a convenient tool for remote installation and update of Windows Agents on multiple machines.
Prepare a list of machines where Agent for Windows should be installed
Create a .csv file containing hostnames or IP addresses and access credentials, one machine per line:
host1 user1 password1
host2 user2 password2
host3 user3 password3