Acronis Backup 12.5: Windows VDI does not work if Agent for Hyper-V is installed

Symptoms

1. You have a Hyper-V host with Virtual Desktop Infrastructure role;

2. You install Acronis Agent for Hyper-V;

3. When you try to create a new automatic collection, creation fails with 

Could not retrieve the virtual desktop template details for <VM_Name>

Cause

SAN policy is set to Offline All during Agent for Hyper-V installation. This change is necessary to prevent Windows from breaking the bootability of the VMs recovered and/or converted from backups by Agent for Hyper-V.