Hyper-V Virtual Machine User Account Permission Issue

I am trying to attach a VM's IDE Controller, DVD drive to an ISO file on a remote server's USB drive.  I created a share to the USB drive with full access rights to everyone.  I can browse to the ISO file but get the following permissions error when I try to Apply: Failed  to add device 'Virtual CD/DVD Disk'  User Account does not have permission to open attachment.

What am I missing?
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This is often seen. Just copy the ISOs that you are going to use to your hyper-v. Will save you time and nerves.
Philip ElderTechnical Architect - HA/Compute/StorageCommented:
Configure Constrained Delegation for CIFS.

Once configured recycle the VMMS service on the Hyper-V host. Make sure Hyper-V Management is closed before running the above steps.

Once done, any ISO or VHDX file can be mounted in a VM on that host from the source server.

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HeilandSAuthor Commented:
Thanks Philip.  That worked easily.
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Funny, for me it didn't work, had the same problem. I went through these steps and additionally through these similar steps here: http://fixmyitsystem.com/2012/10/Hyper-V-Iso.html
What Hyper-V  version do both of you run?
I run 2012R2.
HeilandSAuthor Commented:
I am running Hyper-V Server 2012 R2
Weird. I can go through these steps one by one and it does not change anything for me.
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