You are using Agent for VMware or Agent for Hyper-V or Agent for Scale Computing HC3 (in Acronis Cyber Protect 15) to protect virtual machines in agentless mode.
In addition to agentless backup, you installed one or several of the following Agents inside a VM:
- Agent for Windows
- Agent for Linux
- Agent for SQL
- Agent for Exchange
Machine with Agent appears twice in the list of All devices: once as a virtual machine, once as a virtual machine with an agent inside.