The volume size limitation is 127 GB, and you cannot select SCSI interface
Citrix systems have a peculiar drive letter assignment. This article gives description of how to deal with this peculiarity.
HVM virtual machines are recognized as physical machines
Step-by-step instructions on how to convert a backup archive (.tib) to a virtual machine
This has been fixed
You can use a special Acronis utility to import a .vhd file to Citrix XenServer
List of virtual machine applications supported by the latest versions of Acronis products
This article applies to:
How to import ova.xml to Citrix XenServer
The issue is with the network configuration of the virtual machine