I managed to fix the permissions issue (not sure how, it just eventually worked, the only changes i made were removing and remapping the share and several reboots but it didn't work straight away).
However 2TB of free space wasn't enough and still complained about insufficient free disk space once it started running. Although the B&R tool doesn't complain about insufficient disk space before it allows you to run it, it fails once it moves onto the larger drive (1 drive shows as 222GB and the other shows as 3.6TB)
I am now using an alternative server, with 4.5TB free space and the VBK Extractor tool is running.
I was wondering if someone could assist with the following scenario;
Once the backup has been extracted, I will need to move this to the client server and start it as a VM on Hyper-v. What are the steps for doing so? Veeam has some steps for running the VBK extract but doesn't detail what to do after the files have extracted. I am just assuming that i will copy these over to the client's server and then create a VM & attach the disks?
My question still hasn't been answered about why the requirement is 4TB when the backup of the server is only 925GB?
Also is there any way that the client can perform backups without all the extra space and only include the "used" space?
any help appreciated..